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  • Stuttering of the engine?

    My car has been misfiring which is more like stuttering. It happens only when I am accelerating (not in idle) and more often when I accelerate on a gear at low RPMs. My catalytic is completely shattered. Anyone recognize these symptoms? I am leaning towards a clogged up exhaust due to the bad cat but I want to hear more opinions because if it is the cat I cannot do anything for about 2 months.

    An electric or fuel problem would cause misfire even at idle right? By the way the car has a new air filter.

    Thanks
    Lenore<br />Red 1996 Camaro 3.8L M5<br />Flowmaster 80 Series, Pro-5.0 Shifter

  • #2
    Is it throwing a SES light and have you had it scanned?

    If there is no light a clogged cat will cause that problem

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    • #3
      the SES light has not come on.
      Lenore<br />Red 1996 Camaro 3.8L M5<br />Flowmaster 80 Series, Pro-5.0 Shifter

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      • #4
        Just my guess, try running seafoam. My buddies s10 was doing that we ran seafoam thinking the engine was gunked up (210,000miles) and he says it runs like a new truck now.


        Worse case senaro, seafoam doesn't work and you'll be out 5 or 6 bucks, but at least you'll have a clean engine.

        I think it's weird the SES light doesn't come on though, if your getting misfires it should throw a code of some sort.

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        • #5
          Originally posted by Merlin:
          My car has been misfiring which is more like stuttering. It happens only when I am accelerating (not in idle) and more often when I accelerate on a gear at low RPMs. My catalytic is completely shattered. Anyone recognize these symptoms? I am leaning towards a clogged up exhaust due to the bad cat but I want to hear more opinions because if it is the cat I cannot do anything for about 2 months.

          An electric or fuel problem would cause misfire even at idle right? By the way the car has a new air filter.

          Thanks
          sounds exactly like what my car is doing. no SES light either. My cat is fine and a mechanic said my plugs and wires were fine too. I just can't seem to figure out what the problem is. I switched from 87 to 89 octain gas and it seemed to help some.
          \'98 3.8L m5<br /><br />whisper lid<br />SLP CAI <br />lsd <br />3.73 gears <br />Flowmaster American Thunder catback exhaust

          Comment


          • #6
            Originally posted by stealth1281:
            </font><blockquote>quote:</font><hr />Originally posted by Merlin:
            My car has been misfiring which is more like stuttering. It happens only when I am accelerating (not in idle) and more often when I accelerate on a gear at low RPMs. My catalytic is completely shattered. Anyone recognize these symptoms? I am leaning towards a clogged up exhaust due to the bad cat but I want to hear more opinions because if it is the cat I cannot do anything for about 2 months.

            An electric or fuel problem would cause misfire even at idle right? By the way the car has a new air filter.

            Thanks
            sounds exactly like what my car is doing. no SES light either. My cat is fine and a mechanic said my plugs and wires were fine too. I just can't seem to figure out what the problem is. I switched from 87 to 89 octain gas and it seemed to help some. </font>[/QUOTE]Have you tried checking the fuel system? filter, etc? I am not sure if SES would come on or not but it is worth the try. Maybe the air filter too?

            Mine is a really noticeable misfire like the engine completely chokes. In fact I cannot even burn my tires anymore. But it is not a persistent misfire, it happens only every now and then when accelerating. I am 99% sure it is the cat, but I wanted to hear other opinions. I think pieces of the cat may have fallen into the resonator that comes with the Flowmaster catback.
            Lenore<br />Red 1996 Camaro 3.8L M5<br />Flowmaster 80 Series, Pro-5.0 Shifter

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