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  1. General Maintenance, Troubleshooting & Accidents.
    Hey guys, ive been prowling these forms forever, and although nearly every question ive ever had has been answered here, or somewhere online, i have a unique situation that i need assistance with. I have a 1996 GC8 WRX with a recently swapped 1996 EJ20g on a U8 ecu. Car is stock other than a...
  2. General Maintenance, Troubleshooting & Accidents.
    2006 wrx misfires at idle only. The car is fine until it warms up and then it starts misfiring like crazy and the cylinder roughness goes up to like 75 sometimes and sometimes I’m at a light and it doesn’t misfire whatsoever but sometimes it idles so it’s super random. The car runs amazing under...
  3. Engine Modifications
    Found out my car was running lean about week ago My buddy hooked his obd reader up to it and it read about 11afr from idle to any rpm. Rented a fuel pressure test kit from oreillys, pressure came in at 43 psi priming it then holds steady at idle, under load the pressure stays the same all the...
  4. Tuning: Electronic Engine Management
    Foreword: I don't have a WRX but NASIOC has to approve my thread and UltimateSubaru has to approve my account, which I'm still waiting on, so I was hoping to possibly get some help here. I also thought it would be better to post here instead of the "General Maintenance, Troubleshooting" subforum...
  5. Engine Performance
    Ok y’all I have an 03 bugeye I bought late last June, I just rolled over to 150k last week. Interestingly enough within 2 days of said milestone, I was driving on the highway and got a horrible engine shudder and blinking CEL. I diagnosed the issue and have since then tried 2 different sets of...
  6. General Maintenance, Troubleshooting & Accidents.
    test
  7. Maintenance, service, and repair
    I have owned this car for 3 years now, its has 65k miles now. Around 60k I started to notice a rough idle no check engine at this point take it down to Temcula Subaru/Mazda because I received a recall for the exhaust system. I had them do I diagnostics and came back that the ground electrode has...
  8. General Maintenance, Troubleshooting & Accidents.
    Hey Guys, new guy here! I apologize in advance if I am somehow posting this in the wrong spot. I just joined today and was hoping for a little bit of help or insight. I daily drive my WRX and have kept up with all maintenance and have babied the thing for a while now. I have done minor...
  9. Engine Modifications
    Hello all. First post here. You guys are my last hope so hopefully someone can point me in the right direction. About 2 months ago, I installed a new stage 3 clutch and 9lb aluminum billet flywheel on my 05 WRX. The car ran fine after this but my desire to continue upgrading it was...
  10. General Maintenance, Troubleshooting & Accidents.
    Looking for some help here. I have a 2017 WRX, the car has a full 3” Turbo Back Exhaust, Cobb CAI, and Cobb tuner. I randomly had an issue where my car will start great but immediately kill itself. Sometimes taking multiple times to actually run. Then you can feel a miss while driving. The car...
  11. STi Technical Forum
    I own a 03' Bug Eye. She's been running kinda rough idling but drives pretty smoothly, I also have a small exhaust leak. So I was bored today and was kind of surprised to see what codes it threw. Any idea / comments / solutions?? P0102 Mass or Volume Air Flow Circuit Low input P0113 Intake Air...
  12. Tuning: Electronic Engine Management
    I recently put on a Invidia catless DP, borla hush exhaust, HOA 3 port boost solenoid, and has an SPT intake. I went and got it tuned at a local tuner. He said tune is done but my plugs were bad and car has a slight misfire at higher rpms due to this. I asked if everything would be fine with...
  13. Engine Modifications
    Alright so I have a 2005 wrx 36k miles bought a month ago been having problems ever since back at dealer under warranty but its a used lot so its taking forever...finally ran a compression test and I was told cyls 2 and 4 are low and 2 is real low. Didn't give me exact numbers. Ik observed some...
  14. Engine Modifications
    Okay so, just recently bought an 05 limited rex with 36k miles. Ran fine the day we test drove it and then the day we got it it was acting strange. was originally told it was a TPS and it got some bad gas and that i was supposed to run it out and fill it up and w.e still no good. went back next...
  15. General Maintenance, Troubleshooting & Accidents.
    well my 02 wrx has been misfire and running rich for a while.at first i thought it was the spark plugs which stopped the misfires on 2 3 and 4. but still misfires, but when its going up hill in 4th or 5th gear the cel will flash for about 5 seconds and not stay on and in all the times Ive reset...
  16. Tuning: Electronic Engine Management
    Hey guys first off thanks to anyone who is willing to help me with this issue. My 04 STI has been having a problem with misfiring. I know exactly when the car is misfiring because at around 6000 rpm the car will have the check engine light flicker about twice. My codes are P0301, P0302...
  17. General Maintenance, Troubleshooting & Accidents.
    Hi, so I am a new owner of a 2002 WRX and the check engine light has come on. According to my mechanic, this could be due to 60 different things. He says my car is misfiring and usually due to coils or spark plugs. He says the spark plugs are good and that he is checking the 3rd coil and that...
  18. General Maintenance, Troubleshooting & Accidents.
    Hello All, Thank you for reading, and for those that help, THANK YOU VERY MUCH!!! Okay, so here is the diagnosis: Misfire cylinder 2, tossing a code, activating Mil Check everything: Plugs, Wires, Coil pack. Everything seems okay. Only sputters/misfires under heavy load, such as rolling at...
  19. General Maintenance, Troubleshooting & Accidents.
    CEL- Misfire in Cyl 1 Hello, If anyone can help me. I've got a check engine light on an '03 WRX that reads a misfire in cylinder 1. I've had the coil pack replaced and the plugs and plug wires are good. I figure that the most likely issue is the fuel injector. The light only comes on after...
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