MisFire vs Backfire. What is the difference?

Posted by TURBOSPYDER, Jun 11, 2002

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  1. TURBOSPYDER

    TURBOSPYDER Proven Member

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    Joined Feb 21, 2002
    Daly City,
    Im not sure if they are the same thing. I datalog my car , and showed trouble codes of a Cylinder 1 misfire. I changed the plugs and its still happening but only when Im running the car normal. Not at WOT. Plus, does anyone know what trouble code : P0300????? any info can help . Thanks
     

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  2. NJGSX96

    NJGSX96 Proven Member

    694
    1
    Joined Dec 11, 2001
    YMB, New Jersey
    P0300 - Random/Multiple cylinder misfire detected
     
    My DSM:
    1992 Eagle Talon TSi AWD

    11.902 @ 116.010 MPH
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  3. g96nt

    g96nt Proven Member

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    Joined May 15, 2002
    Leominster, Massachusetts
    misfire..... it just doesn't feel right..

    at idle, you'll have a sputter, stutter, spit, or burp
    and at speed, it'll jsut give a jitter, or WAY up there, it'll feel like the Car stalls For a split-second.


    a back-fire.... you'll *KNOW* it'll be like *BLAT* POP, BANG, or even explode, if you're lucky...

    backfire is when you have Fuel get past The exhaust valves, into the exhaust, and It hits somethign *HOT* and ignites... could be a Really hot Cat, muffler, or even a toasty-warm turbo/o2 housing.
     
  4. TURBOSPYDER

    TURBOSPYDER Proven Member

    143
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    Joined Feb 21, 2002
    Daly City,
    So what does a misfire mean? anything I can do to prevent it? What causes misfire?
     
  5. g96nt

    g96nt Proven Member

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    Joined May 15, 2002
    Leominster, Massachusetts
    to Corect misfire?

    re-gap you plugs.... check your plug wires...
    make sure you have no intake leaks..

    tune your Car.. do you have a datalogger?

    check your sensors (front O2, TPS, ISC..)
     
  6. g96nt

    g96nt Proven Member

    55
    0
    Joined May 15, 2002
    Leominster, Massachusetts
    to Corect misfire?

    re-gap you plugs.... check your plug wires...
    make sure you have no intake leaks..

    tune your Car.. do you have a datalogger?

    check your sensors (front O2, TPS, ISC..)
     
  7. allturbo

    allturbo Proven Member

    104
    1
    Joined Jun 1, 2002
    socal, California
    A cam angle sensor going bad will cause misfires.
     
    My DSM:
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