I blipped it a few times and it ran reasonably smooth over 2000 rpm, or so, but at idle speed (around 850) it was very rough, then threw codes, P0420 and misfires on 2 and 4. 27 posts · Joined 2013. ) . Apr 27, 2017 · 89 posts · Joined 2016. 5x Sleeper pointed out - we would probably need to know what the CEL code is. I bought a new direct fit cat and replaced it as well as both gaskets on the cat and both Jan 27, 2012 · 1 post · Joined 2012. If anyone has really solved this problem, would like to know. It runs great! Starts fine, no lack of power on the highway, engine sounds good, but the idle is irregular/rough at times and there's even a tiny bit of a shake sometimes. It could mean a bad rear 02 sensor, bad front 02 sensor or bad cat. #14 · Sep 18, 2022. I have just yet to back probe them while running. Fast forward to when I get back and I drive it to work one day and it rides rough about 10 minutes in. I followed the procedure in the below YT video, and to my Aug 9, 2008 · TjFitz. I tried disconnecting the MAF to see if it runs smoother, but it didn't make a difference. But your "bouncing" and "hiccuping" sounds like a problem with the way the engine runs, like a cylinder with a miss or sticking valve or low compression. The front O2 sensor is important Mar 15, 2011 · I just completed a head gasket replacement on a 98 Forester 2. I have massive oil consumption issues and really rough idles, especially after driving at highway speed and then getting into town stop and go traffic. Old stalls were floods. Ascent, Forester, Impreza, Outback, other vehicles are included. Joined Apr 29, 2014. Oct 21, 2019 · These engines are efficient (i. Jan 6, 2022 · 5096 posts · Joined 2021. The car runs and feels great above 1500 RPM, but when it is cruising along at 30mph in 4th gear at 1500 RPM, there is a loud rumble. 5L Touring (non-turbo) currently with 60400 miles on it. Assuming problem was related to your washing, 3 things could have happened: water caused electrical problem, got into intake, or got into oil filler tube. 6M posts 191. I attached the datalog if anyone can see something. The only way to avoid stalling is to return to idle RPM gradually by staying in gear while slowing down until the engine is at idle speed before pressing in the clutch. I replaced the plugs wires and coil, I also replaced the fuel and air filters and the PCV valve. #11 · Apr 21, 2017. If you could hook up to a good scan tool; i would bet Aug 3, 2021 · Subaru Recalls More Than 165,000 Cars and SUVs to Fix Stalling Engines. Power. Also i'm getting some surging at lower rpms and slowers speeds. struts. Jump to Latest Follow 61 - 66 of 66 Posts. Bought the car recently after my 00 was totaled in a rear end at 60. Now if the engine goes under a semi-heavy load. The engine stutter happened about 4 times since I purchased the Forester in July 2019. #1 · Sep 17, 2011 (Edited) For awhile now, my Forester XS has ran rough after refueling. Sep 20, 2015 · The P0420 is "cat below threshold efficiency". Wait 10-15 seconds so the electronic throttle body or IACV has time to go to the factory programmed home position. EJ25 - 2. If you see arching or notice a misfire than that coil will likely be the culprit since it has happened before. My Forester has roughly 60,000 miles on it. Apr 22, 2013 · I am new to Subaru vehicles and I recently purchased a '14 Forester XT Touring this past Monday and traded in my '07 RAV4 V6. The idle RPM will adjust automatically every 20-30 seconds unitl it gets to the correct RPM. Aug 11, 2013 · I pumped the gas, it started and was idling rough. Jun 24, 2012 · 951 posts · Joined 2010. Sep 18, 2014 · enigine running rough. Hopefully it's just "a Subaru thing". Apr 19, 2017 · 2644 posts · Joined 2011. #3 · Jan 23, 2019 (Edited) Solid check engine light is just indication of a code fault that is present in the ECU. The weird thing is, I was anticipating a rough running engine for the rest of the commute tomight, but it was fine. Pull and clean the sensor as well as the electrical connector. #4 · Apr 21, 2017. Im at a loss any suggestions? Apr 23, 2013 · My idle relearn procedure: --------------. Dec 23, 2014 · Intermittent rough running. About a year ago, it started exhibiting some behavior where when (usually) it's cold outside, it will have a hard time starting. Well the bezel is still plugged in and when I press the bulb in to it's hole, I can see it's light through the cracks. Start on one side then move to the other. You need to drive yours (under throttle, not just idling in traffic) to warm it up. 8%. Codes keep coming up 3&4 missing on cold start May 13, 2014 · I've found that when my car is cold, it idles rough and the boost psi is -4 for about 20-30sec. That drive lasted about 5 minutes. Jan 10, 2023 · 46 posts · Joined 2020. 2 posts · Joined 2009. I have a 2014 XT with approximately 6000 miles on it and have noticed that the engine often shakes/wobbles when idling. Recently had the 60,000 mile service done at the dealer, but no spark plug wires or coil pack replaced, didn’t change the issue. I took it to my shop and their 'Subaru specialist' said all the 2002s run rough. so I pulled the engine and did all the work. Oscillates with engine load like AC. Dec 9, 2011 · Hi guys, just after a bit of advice on my foz. Feels like a misfire but has no codes. It's not rough like a bad plug wire or dirty injector, it's just not as smooth as I would expect a modern car to be. 9 posts · Joined 2011. Plugs cannot be covered in oil unless you have holes in postons, it could be unburnt fuel. Hi, I'm a new user here having some problems with my 02 Forester. Nov 10, 2013 · It was running somewhat rough (not as rough as now) when I first bought it. I believe I only have two possibilities left, 1) wiring as stated above or 2) the timing gear (the magnet/metal in the gear/ or play/ or rust etc. I am still able to hit 16 17 PSI so I don't think the car has any boost leak. Sep 18, 2019 · Just replaced original battery. Jun 9, 2010 · The engine acts the same (missing/stumbling and running rough at idle) regardless of whether or not the front O2 sensor is connected. Any loss of air in the intake tract, pre or post turbo, will affect how the car runs. Feb 16, 2010 · Jeff04FXT Discussion starter. Jun 24, 2009 · 2. Before the tear down I got P0171 - Fuel Trim; Bank 1: System Too Lean, I now . Once it warms up about 3 minutes later the problem disappears and it drives like normal. Hi, I have an interesting problem with my '06 Forester. Replaced battery after returning and have had a rough idle ever since. Jun 20, 2018 · Okay, ordered a tank and took a different vehicle on our trip. General Troubleshooting and Technical Help May 8, 2017 · There is a hack for fixing a rough idle, after the battery has been disconnected. 5X and I love it. In most cases, the oxygen sensor develops a crack and the check engine light comes on. And it works, too! My 2015 Subaru Forester 2. For example removing the sway bar links would let it travel over uneven or roads that have dips in Apr 21, 2017 · E. It happens quite frequently and seems to happen more when the AC is on. It was a solid light with the eyesight/safety features disabled, and it read P0300 on a code reader. Commute home was fine for the first 45 minutes. The dash is lit up like a Christmas tree with the cruise flashing and two vehicle dynamics lights on. Apr 20, 2015 · 1998 forester S running rough Jump to Latest Follow 631 views 0 replies 1 participant last post by JonesClay Apr 20, 2015 Jun 4, 2019 · Technical Forums and Vehicle Assistance. Sounds to me like very bad detonation, probably Oct 4, 2011 · R. Also poly bushings will ride more rough than rubber. Maf g/s average between 1. dmakley Discussion starter. Subaru is recalling Oct 17, 2018 · Idle is smooth and RPM stays at 1500 until blue light goes out. @Velvety I’m a first time Subaru owner, purchased the 2019 Sport and I noticed a rough idle from a cold start. If your struts arent working correctly, and you have UHP tires that alone will give you a ride that will knock your fillings out. NeilMG · Registered. Jan 20, 2021 · Andursun0013 Discussion starter. Then it drops down to 750-800. Also changed the two vacuum lines running from the air box. No problems at -15 either, just between 0 and 5°C Before that it's also not too serious, no belching of smoke, no explosions, just a feeling like it mis-fires a few times when I press the accelerator. 0 16V non turbo - rough idle, engine stalls when cold, engine management light on, sometimes flashes when cold (assume this is unburnt fuel through the system). If not get a datalogger and record some of the vitals. A faulty fuel pump is the cause. After that, the boost drops to -10psi and it idles smooth. 2) Disconnect the battery for 30 mins. Oct 29, 2021 · I’ve watched the fuel trims and it is dumping fuel in, short term fluctuating between roughly 8-20% and long term mostly at 14. #1 · Nov 26, 2012. Cruise Control light flashing again. It happens when the ECM decides the signal from the sensor indicates that the cylinder is misfiring. 2001 Forester S 4EAT 2001 Forester S 4EAT Feb 10, 2013 · running rough, 1&2 misfire ('06-'08) Jump to Latest Follow 1K views 3 replies 3 May 21, 2013 · 2014 Forester XT CVT. I began using premium fuel and, lo and behold, the car ran much more smoothly. Pick one out of a hat and replace it. After highway driving and coming to a stop, rough idle and just about stops running with a few dash lights for entertainment. Yesterday, waiting at a stoplight after driving for about a mile the engine RPMs at idle dipped a few times, car shook a bit and then CEL came on with a May 5, 2017 · The 2004 Subaru Forester has 1 problems reported for engine runs rough. 5g/s at idle and seem to rise steady and top out around 190 at the top of 3rd gear. It is idling very rough and has poor acceleration. 2 posts · Joined 2016. The ride seemed noisy so I changed the front end links and that got rid of the “clanking” noise. After a couple of days of this, the CEL and traction control lights came on - with cruise control flashing on the LCD display. wiz561 Discussion starter. It feels as though the car Mar 7, 2020 · My 04 XS forester is at 185k. 5L DOHC, including timing belt kit, water pump, seals, plugs, wires, etc. Jun 17, 2009 · After that, it starts right up & I just drive normally. Engine and Exhaust. But again, it could be a variety of things. The source of this trigger is originated in the crankshaft position sensor. I have a couple things I'm curious about - probably normal Subaru stuff I'm just not used to. 0l - Rough running, loss of power - O2 sensor? I have had a loss of power and general rough running so replaced spark plugs and air filter to no avail. Jan 18, 2015 · Just posting this up as I used this forum to isolate/track the issue on my Forester 2001. Dec 2, 2016 · W. #20 · May 22, 2008. I changed PCV, plug wires, plugs, service throttle body, knock sensor, changed the engine, transmission and the pitch stop mounts. So frustrating! I don't really feel like shelling out $200 for a Subaru specific O2 sensor and have it not end up being the culprit. #23 · Apr 29, 2014. Jan 11, 2021 · 2016 Forester 2. Easy Fixer. Things I’ve tried already: Grounds Battery Cleaned map/maf Nov 8, 2022 · I re-checked the gap and torque on the plugs, and am 100% confident everything is right, but it's still running weird. Tires. May 16, 2021 · Important info: While driving, the car runs fine and appears to have all of the power it is supposed to have. Could be electrical. The engine shakes at idle (~600rpms),also if you rev it will drop down in rpms below 500rpms almost stall. It idles very rich. When motor is hot it runs great. Apr 3, 2011 · As an aside, and not related to the OP, in Subaru's case, P0420 code is not necessarily an indicator that cat is indeed bad. 2 Posts. I had the oil changed and the Dec 1, 2013 · 10526 posts · Joined 2007. It needed head gaskets, timing belt etc. All went well and after putting it back together it still has the same surging issue which is not surprising. It'll crank a few times and then start. P0420 issues will not normally result in rough idle or rough running, unless it really is the front O2 sensor. 5x_sleeper. 2008 LL Bean. - As the engine gets warmer, it starts to idle rougher with an intermittent skip, which visibly shakes the engine. 45886 posts · Joined 2007. Thanks for the info re: the idle. Starts up runs fine but as soon as I get 1/4 mile down the road it dies. Then track down the ones that aren't right. LOL. Jan 19, 2022 · First Forester (actually bought two this weekend, really good deals). Please forgive me for what might be an obvious question but I'm new at this. Any other ideas please. #1 · Oct 9, 2013. You have the induction system messed up. From day one the idle goes from 500 to 2000 for 5-10 seconds on a cold start then settles at 1500 until you touch accelerator. 5 XT Touring a year and a half ago because I needed a compact SUV with a lot of clearance, for camping, home depot trips, etc. The rpms stay the same at about 1,600 until the blue coolant light goes off. Jul 7, 2013 · Reconnect the battery. All starts ok, and I can be driving normally 40-50 miles an hour all is good. suspension bushings. Average repair cost is $2,500 at 153,000 miles. I've cleaned the throttle body, iacv, egr and replaced the pcv valve, coil and sparkplugs and wires. Hi! We have a 2011 Forester 2. Rough Idle on 2008 Forester X. foz has 199000 miles. #2 · Jan 7, 2022. It was idling below 500 rpm. A flashing check engine light means there is a active misfire. Louisville, KY. Apr 21, 2020 · 2012 - CEL, Running rough, stalls at complete stop? ('09-'13) Jump to Latest Follow Subaru Forester Owners Forum. I began to crank it again and it was still hard starting. I will periodically get a random "misfire" or what feels like a fuel cut at 2. Just got a brand new 2011 forester 2. It does start, but runs extremely rough, surges, and eventually dies if I don’t throttle it. Got back to the yard and it idled very rough. 5-3k under hard acceleration. Jan 6, 2015 · The commute into work this morning was uneventful, car running fine. e. I have a handful of codes that I just got from Advanced also I just had Aug 31, 2011 · Running really rough when under power ('01-'02) Jump to Latest Follow 21 - 26 of 26 Posts. I have a question regarding my 2002 Subaru Forester. Nov 20, 2017 · Could be many things causing the issue - if you haven't already done so I suggest you have a read of similar threads here; just search the fault codes. It would take ours 5-10 mins (several klms) to warm up enough to blow warm air from the heater. The O2 sensor lets the car’s computer know if the fuel mix is lean (too much oxygen) or burning rich (not enough oxygen). Vacuum leaks are the first thing I'd check for. Having a rough idle mainly in Park and Neutral. Once it started, I held the Rpms at 2500 and let the clutch out and headed home. Jan 18, 2024 · 2015 - Running VERY Rough (video) MYSTERY? ('14-'18) Tags rough idle subaru forester unburnt fuel. rcmcg2 Discussion starter. Then start it and allow it to idle for 8-10 mins without touching the accel pedal or putting any significant load on it like a/c, head lights, power windows or even changing manifold pressure by applying the brakes. It feels like the engine is misfiring, but after a mile or so, it runs fine until the next refueling. I mentioned the rough idle issue and the advisor told me that the tech updated the ECU or ECM. Aug 31, 2019 · Your Forester’s engine needs air, fuel, and spark to achieve optimum ignition . Jun 8, 2009 · D. Now the car runs rough and message on face of radio says, "check systems" Aug 13, 2009 · It always runs great for a few days then starts to chug and occasionally won't start or runs rough. Jun 2, 2021 · fwiw - I had a very rough engine a few months ago, turned out to be one of the ignition coils the code reader at the auto parts store said it was a misfire on the #2 cylinder. Jump to Latest Follow 598 views 0 replies 1 The Turbo motors from this era (EJ255 & EJ257) do have a tendency to have the AVCS solenoids go out at high mileage which causes a rough idle and stalling. 1341 posts · Joined 2012. Jul 29, 2012 · After resetting the ecu, turn key to on/run for 20 seconds then back to off. I make sure the gas cap it tight, but it's doesn't seem to make a difference. If this value is over so many a minute, it than turns on the CEL and disables the cruise. 5i Premium. Forester 2001, 2. Issue: Rough idle occasionally. ,. robotpeon Discussion starter. I've got about 3000 miles on my 2017 Forester 2. My 2016 XT with 68k miles is running rich it seems all the time, the evidence is in the performance and poor fuel economy. The idle is slightly rough, particularly after I've driven for awhile and come to stop at a light or at home. Mar 2, 2013 · Engine was running rough and surging at idle and would eventually stall. 5 posts · Joined 2008. Apr 13, 2011 · 3) As 2. the induction system messed up. p0031. Code P0138: O2 Sensor Circuit High Voltage (Bank 1 Sensor 2) That would be the rear O2 sensor, which is a good thing read on. #2 · Jun 24, 2012. Hesitates, not smooth, almost stalls etc. swombat Discussion starter. like up a hill and I have to punch the gas a bit I get a hesitation and sometimes a quick ping/knock sound and then it picks up and goes. One is having an issue where it runs rough intermittently when warm. Got it back in the car this past weekend and it does not want to run on all 4. Jan 23, 2019 · 398 posts · Joined 2013. After starting when cold it runs fine for about a minute then starts to idle roughly and has a serious lack of power when driven. Recently it has been surging/hesitating/jolting. It will clear up after a while and run fine for about a week before it happens again. Then occasionally while driving the check engine light will come on then idle will start to bounce when at a stop light while trying to stall. Mar 10, 2024 · 2001 - 2. 4 posts · Joined 2010. #20 · Oct 25, 2019. #1 · Dec 2, 2016. #1 · Jan 27, 2012. #3 · Apr 4, 2024. #1 · Feb 16, 2010. Jan 5, 2022 · I recently (8/21) bought a used 2011 Subaru Forester X Premium automatic w/ 145k miles on it. Dec 15, 2011 · Hello friends, Ive been reading your advice for years now Im a member with some questions. Anyone here have a huge reason NOT to use a generic O2 sensor such as this one: Apr 4, 2024 · 5114 posts · Joined 2021. Changing the plugs and wires is not a bad thing anyways. I had an engine light that used to reset, but now just comes back after a few minutes. Starts right up and runs rough then dies. May 31, 2022 · On Repair Pal, the most commonly reported problem for the Forester is a failed front oxygen sensor. Sep 29, 2020 · Maybe the bulb is actually just out and the previous owner probably just didn't want to deal with the issue of it running rough without the check engine light turning on. Battery was out of car for 15 minutes. If I shut it off and wait10 seconds it starts normally. A bit disconcerting since none of my other cars I had (save for my '80 Accord that had a manual choke) ran rough at idle. Its been happening for about 6 months now. (3) Reconnect the battery & you're done. I have a 2004 Forester with 85k miles. Brother installs the new tank and replaces spark plugs. It has about 100k miles. Then the CEL came on but this time it stayed on. don't generate much heat) and therefore don't warm up quickly or easily, certainly not at idle. 2K members Jul 5, 2013 · Subaru outback 2002. 5L non-turbo. #1 · Jan 20, 2021. I replaced the timing components, water pump, oil pump, clutch, sparkplugs and a few other things. 8g/s to 3. Jan 4, 2020 · 5 posts · Joined 2019. Troubleshooting steps taken: Replace IACV (Hooray for having a parts car!) Replace Front O2 Sensor Jan 16, 2011 · For the past month or so I have been running kind of rough. (1) Disconnect the battery (usually the ground side). P0302 is the cylinder #2 misfire code. May 5, 2013 · My 14 isn't rough at idle aside from the first minute after startup where it holds RPM at ~1500 for engine warm up to increase efficiency (something to do with cat/fuel, I don't remember). RPMs fall back to idle rapidly and nearly stall before returning to a low, rough idle. Have changed coil wires plugs purge valve tp sensor idle control valve fuel pump changed oil ,filter air filter injectors fuel pressure regulator, o2 sensors. In addition, the engine will also stutter as if it is missing a spark plug or is not getting enough fuel. I'm also noticing a knock at ~1500 RPM that seems to smooth out. I took a look at the battery and noticed a few cells low, so Apr 23, 2012 · Bought my first subaru - 2011 Forester 2. Take it back home, get something else. May 7, 2015 · Rough Idle, Otherwise Running Fine (Solved!) Car sat untouched while I was out of the country for about 6 months, and prior to me leaving, it was running perfectly fine. Since then I put around 650 uneventful mostly highway miles on it. Perhaps a hose isn't connected. :smile: This is the process I use to reset the ECM. If you have a scan tool you could warm up the engine and check the coolant temp via the ECU - should read 75°C (167°F) — 95°C (203°F). Oct 21, 2011 · Do this with a warm engine. Feb 25, 2022 · 2010 Forester X Premium-manual transmission (227k miles) Currently I'm experiencing a funky Idle with my Forester . Still no CELs, just a shaky idle and lack of throttle response. I have the same type of problem with a brand new 2008, 100 miles. Gets smooth when it warms up. A similar thing happens if I rev the engine from idle. Aug 19, 2017 · Forester X rough idle. I've realized it is only a bit rough when it is cold. 2. And lastly the air filter was changed. After the detection, it starts to count the times it misfires. I have 161k miles on my 02 Forester and almost overnight it stareted running very rough. . Drove down the interstate apps 10 miles to my exit. 5X with automatic transmission and about 200,000 miles on the odometer. 5L Turbocharged (2004-2013) Oct 9, 2013 · R. Flashing in the hopes of catching your attention to pull over and stop, not keep driving. 1 4 of 4 Go to page Jul 30, 2015 · A bit of a long story but I will try and make it quick. The MAF meters the air going into the engine. #2 · Jun 24, 2009. :wink: If your engine is operating normally, no hesitation or overly sooty exhaust tip, you might want to consider this. Fuel – The ideal air-to-fuel ratio is 14. this last week I replaced the motor in my 06 forester with an EOM short block from Subaru and had my heads rebuilt and adjusted by a machine shop. For small bumps, a little taller sidewall might help a bit, but for larger dips or uneven road surfaces, there isn't much you can do, that will also create more instability that could become dangerous. (2) Pump the brake pedal a few times to drain any residual charge. Have it scanned, and report back. Cleared them a couple times and they came right back. the 1st easiest thing to check, was a new coil, & that fixed it immediately Jun 4, 2017 · My '11 (140k miles) has been throwing a P0420 code along with running a bit rough, it stalls from a start (oddly the autostart has no issues keeping it running), and I'd say I'm down to about 70% power overall. I just did another start after the car was park for roughly 5 hours, 1 to 2 roughness count on each cylinder. Aug 10, 2011 · This is what I found out from my Subaru mechanic: Even before the Forester throws a code for engine misfire, it detects that there is a misfire happening. No check engine light. #1 · Jun 8, 2009. 1 2. You should likely have something that you can use to attempt this. - Engine idles fairly smoothly while cold. May 12, 2007 · Pencilpusher. The idle RPMs never go below 650, though. Just 'Subaru weirdness' I saw a lot of people on Amazon reviews who all said they needed to replace cat because dealer told them to, and because they had p0420, and thought this "miracle" cure would fix it. On cold start spits sputters and gas Snell. The first year was great, but shortly after I started having problems with *extremely* rough idle - as in the car shaking. 4) Chances are, if it is nothing major, you probably need to replace your front 02 - it can cause the car to run rough and have poor gas milage and some other issues. Idle. This is normal, at start up the ECU runs the high pressure fuel pump (the whining noise you hear) and high rpm to heat up the catalytic converter, as the cat quickly starts to get up to operating temp there are mini combustion explosions of the unburnt fuel hitting the cat (the knocking noise you hear). The car was running fine until about 1000 miles ago then about 5 miles after getting gas the check engine light came on. 3 Premium 6MT (66K miles) was having a somewhat rough idle for about a year, down at about 600-700rpm when sitting at a stoplight or in stop-and-go traffic. Side note dies in same location every time. And then the CEL went on at 28K miles. It idled for a few seconds and stalled. It was recently mapped and Duncan noticed it was running rich, but was unable to lean it out without causing running issues. Oct 15, 2011 · Here are a few more details. 388 posts · Joined 2006. Nov 26, 2012 · S. I have taken it to a mechanic twice and they could'nt duplicate the problem after keeping it for a day. If you plug it in and the engine stalls then there is air entering the engine that the MAF isn't metering. - As the engine approaches normal operating temperature, the skip gets worse and worse until the engine almost dies out completely. Turn key to the first click and wait 15 - 20 seconds (do not turn it all the way to start the car), Then rotate the key and start the car and let it idle. When the engine is warm, all is well. 3 things come to mind. Goes to drive it to make sure it runs and it was fine. #5 · Dec 1, 2013. Also last time I was filling it up the gas pump would continuously shut off. Oct 20, 2008 · The inline fours of my 1971 and 1976 BMW 2002 cars rocked on their rubber mounts more than the Forester engine. 25 posts · Joined 2008. It is almost certainly why the person before me got rid of it. 4) Before you start the car for the first time, turn the key to the ON position but do NOT turn the engine over. It idles rough between 5 and 10 inHG. 7 parts air to one part fuel. I realize that it is common for the boxer engine to do this when starting cold Mar 13, 2016 · Recently purchased a 2010 Subaru Forester, nice car. Mar 27, 2019 · Mine does this as well, as does a friend's WRX with the same motor. Mar 18, 2021 · On my 08 NA I've been getting an issue where when I start it cold everytime it idles rough. Air – The air entering your car’s engine must be metered by the MAF or MAP sensor. Feb 9, 2024 · 2006 - Rough idle after shortblock replacement? - Still. The only symptoms are sooty exhaust and high fuel consumption (27 mpg even taking it very easy on the motorway), and a slight hesitation when accelerating hard from 3000rpm Jun 17, 2009 · Technical Forums and Vehicle Assistance. Oct 19, 2005 · Hi All, I'm a new member and have never posted. 3) Reconnect the battery. Looks like O2 sensor, I have unplugged and there is a small improvement, but still not Jan 27, 2009 · On cold, wet mornings my Forester recently developed a tendency to cough when accelerating. At dealer pricing, that's $100, $150 and $1000 respectively, just for the parts. #1 · Apr 27, 2017. Recently purchased the vehicle. The first thing I've noticed is that from a cold start the engine idles around 1500rpm, which is higher than I'm used to but then gradually decreases Apr 9, 2020 · This is a 2011 Forester/Automatic non turbo If the engine is put under-load, like heavy acceleration ( not teenager type) but normal human type , then will want to idle real rough, like a spark plug or two are off. N. Car still runs fine. I would do this ASAP as this excessive rich running could kill the cat converter. 1) Turn off the lights, aircon, stereo or any system in the car that draws extra current on top of the engine. I dropped the car off at a dealership last week due to CVT leak. Recently about once a week it starts running rough after driving for a few miles. Start it up, idles perfect 750ish smooth. Our grown children got together a few years ago and bought us a 2003 Forester 2. :smile: Feb 1, 2021 · When I went to turn around to return, it stalled a couple times. A couple of weeks driving about 40-50 miles a day I got a CEL for the cat. Not sure what is making it rough at -4 compared to -10psi. I got a vacuum gage today and tee connected it to a line right behind the throttle body. I had a CEL that would only come on in very cold temps and the fuel economy would just drop, I didn't Aug 11, 2021 · MAP was cleaned and swapped out, TPS appears to have no issues. I've had my '14 Forester now for about three months and notice the rough idle for about the first 5 minutes or so. May 11, 2009 · There are unfortunately lots of things that could cause rough idle without a CEL, if thats not enough there are some things that could be causing the rough idle that should throw a code but don't. 10 posts · Joined 2007. At around the 35 second mark it's where the car start idling normally and there's stuff going on. He said he owns a 2002 Forester too, and he solved the problem by regularly using premium fuel. Okay, crux of the matter. #4 · Sep 20, 2019. Brand new spark plugs, head gaskets, timing belt kit, front 02 sensor and few other small things. It's now around 154k. Id go after the ft o2 sensor; the running poor and the 1137-0130 are telling you it seems to be running rich- the 0420 could be a direct result of the running rich. Feb 6, 2023 · 2) Disconnect the battery for 30 mins. Turn off all radio, AC, lights etc. When one or more of these variables is off, it can lead to a rough idling condition. Jun 23, 2014 · Idle is at ~600-700 RPM when stable. Jun 8, 2015 · Hey guys I would really appreciate some insight here, I'm usually pretty good working on my own cars and I'm trying to solve this one without hiring an Aug 7, 2023 · When it does happen, the vehicle goes through waves of smooth and rough idle, with the whole car vibrating a little (can feel it through the seat) when idling gets rough. chpxifzdofcpcdypsdvr