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Thread: Misfire on 1,2 and 3 now 2,3 and 4... help needed!

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    Basic Member Sti-Stef's Avatar

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    Misfire on 1,2 and 3 now 2,3 and 4... help needed!

    Hi all hopefully someone might have some suggestions.
    If recently pulled my 2006 2.0ltr sti engine out for some upgrades. I fitted Sc42 turbo, comp stage 2 clutch/lightweight flywheel, 1000cc injectors, billet fuel rails, braided Teflon fuel lines, FPR, fuelab fuel filter, 340lph fuel pump, oil pump, water pump, timing belt kit and Roger Clarke exhaust manifold/uppipe. I put the motor back in and fired it up to bleed the rad ready for tuning. It's not been driven. Started fine and within a few minutes it started misfiring and threw codes up for 1,2 and 3 so shut her down checked plugs they was fine. Replaced coil packs with another working set and still threw the misfire codes 1,2 and 3. So I decided to pull the injectors and make sure they was clean. Put them back in and started her again.. after about 4 minutes it started misfiring again but this time on 2,3 and 4... any ideas? Am getting very frustrated with this now lol


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    Defpo's Avatar

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    Re: Misfire on 1,2 and 3 now 2,3 and 4... help needed!

    Do you have a base map to account for the 1000cc injectors?


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    Basic Member Sti-Stef's Avatar

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    Re: Misfire on 1,2 and 3 now 2,3 and 4... help needed!

    Quote Originally Posted by Defpo View Post
    Do you have a base map to account for the 1000cc injectors?
    No but my mapper said I could fire it up to bleed the system then don't run again till it's tuned. I will be dropping the oil and putting new in for the tune also

    Sent from my SM-G965F using Tapatalk


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    Drinks beer! HolyCrapItsFast's Avatar

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    Re: Misfire on 1,2 and 3 now 2,3 and 4... help needed!

    I could whip you up a quick map but I need some info first.

    You say this is a 2.0 ltr STi. I assume this is a JDM or is it a swap?

    I also assume this using open source for the tuning solution?

    My journal

    Tuning & Service: Self Tuned
    Machining services: Bob @ Ace Crankshaft, Bayshore NY, Ralph @ Chudnow Manufacturing

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  8. Top Of Page | #5
    Defpo's Avatar

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    Re: Misfire on 1,2 and 3 now 2,3 and 4... help needed!

    definitely need a new map for the bigger injectors. most likely flooding the cylinders, causing the misfire. Talk to your tuner or HolyCrapItsFast about getting a base map worked up.


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  10. Top Of Page | #6
    Basic Member ShamxSTI's Avatar

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    Re: Misfire on 1,2 and 3 now 2,3 and 4... help needed!

    Hi mate most mappers wont follow adaptations once mods are carried out

    This needs to be done properly by the owner

    And according to the full procedure or the wrx or sti will not run properly and always chuck codes as none of the figures are calibrated on the ecu does not matter how much you mod it the car needs to set its self if that makes sense.


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    Basic Member ShamxSTI's Avatar

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    Re: Misfire on 1,2 and 3 now 2,3 and 4... help needed!

    Quote Originally Posted by ShamxSTI View Post
    Hi mate most mappers wont follow adaptations once mods are carried out

    This needs to be done properly by the owner

    And according to the full procedure or the wrx or sti will not run properly and always chuck codes as none of the figures are calibrated on the ecu does not matter how much you mod it the car needs to set its self if that makes sense.
    1 step colder ngk iridiums and a contact cleaner on MAF & MAP sensors

    Along with new DV gasket (common leaks)

    Also once checked and cleaned follow the

    Sti adaptation processes

    Items needed
    (use stop watch or timer on your mobile)
    And 8-10mm spanner for battery connection

    This is to reset ecu once servicing item(s) listed above

    Usually a cold start before leaving battery disconnected for 30mins then reconnected leave ignition on to prime pump for 30secs

    Start car for 5 mins with no power or auxiliary on (all items must be switched off during this procedure)
    Keep lights climate control off as any current dip will not set ecu.

    After 5 mins of idle
    Swith engine off for 30secs
    Then switch ignition on

    wait for 30 secs and then
    Leave running for 10mins with no gas etc
    ( leave engine running again with all auxiliaries & radio lights off)

    and then swtich off and leave for a futher 30secs then switch ignition on for final time for 30secs and start and test drive.

    Hope its sorted mate

    Its going to breath better once all calibration is completed successfully.


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    Basic Member Nickhabby1's Avatar

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    Re: Misfire on 1,2 and 3 now 2,3 and 4... help needed!

    How's it going everyone so I have a serious issue I dont know how to post on the forum so here it goes. My wife had bought me an 08 sti which had a few modifications done amr down pipe and turbo with some other things and a street tune it was in New Jersey. I'm living in Texas an had the car shipped down here and my wife had not a single problem with the car while it was in New Jersey. Since it has been in Texas I've had to replace the coil on cylinder 3 twice now today when I went to go get the code read. It now says misfire on cylinder 2,3 and 4 if anyone has any suggestions I'm going to bring it to my local shop this weekend but if anyone has any idea's please if you can help. Thank you


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