MisFire vs Backfire. What is the difference?

Posted by TURBOSPYDER, Jun 11, 2002
Newbie Forum - Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum.

  1. TURBOSPYDER

    TURBOSPYDER Proven Member

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    Daly City, BAY_AREA
    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

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    P0300 - Random/Multiple cylinder misfire detected
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  3. g96nt

    g96nt Proven Member

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    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.
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  4. TURBOSPYDER

    TURBOSPYDER Proven Member

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    So what does a misfire mean? anything I can do to prevent it? What causes misfire?
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  5. g96nt

    g96nt Proven Member

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    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..)
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  6. g96nt

    g96nt Proven Member

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    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
  7. allturbo

    allturbo Proven Member

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    socal, California
    A cam angle sensor going bad will cause misfires.
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