All four cylinder misfire advice?
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This is a discussion on All four cylinder misfire advice? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I have an 02 wrx with 145xxx miles on it and I'm getting the all four cylinder misfire codes randomly ...

  1. #1
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    Arrow All four cylinder misfire advice?

    I have an 02 wrx with 145xxx miles on it and I'm getting the all four cylinder misfire codes randomly appearing.

    I read the sticky, and that's why I'm starting the thread.

    I think I've screwed myself, I got a lightened flywheel months back when my stocker was blued and cracked... It's an ACT street lite and I thought I read it would not cause codes, but that may only be for 2.5s...

    I have changed plugs to NGKs, replaced two coil packs and replaced the knock sensor. But nothing has solved the issue. I do not feel the misfires and my mpg is fine for a car with as many miles as it has.

    Can the crank sensor sensitivity be tuned out with a Cobb AP? I did a little reading, and the DTCs can be disabled but what are/is DTCs?

    Can I clean the maf with brake cleaner or a similar solvent?



    Thanks.

    -Drew

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  3. #2
    He simply abides. SD_GR's Avatar
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    I would not clean a MAF with brake cleaner. I'd use MAF cleaner or electronics cleaner because I don't know what the constituents are in brake cleaner.

    Make sure the diagnostic connectors under the dash are not connected.
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    Ok. I'll grab some when I get the permatex dielectric grease....
    Thanks for the input.

  5. #4
    Registered User Ingo's Avatar
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    DTC = diagnostic trouble code...
    You can't have everything - where would you put it?

  6. #5
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    Quote Originally Posted by Ingo View Post
    DTC = diagnostic trouble code...
    So I can get a Cobb AP and fix the issue? Assuming it's the flywheel causing the issue?

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