Question about 2002 Chevrolet Monte Carlo

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02 monte carlo, radom misfires, EGR circuit failure

Will not pass smog:radom misfires, EGR circuit failure
changed EGR valve, and spark plug

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  • krush777 Nov 25, 2008

    All spark plugs changed and misfire happens under load and idle above 1k RPM's

  • Anonymous Mar 26, 2014

    random misfire on one or more cylinders

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  • 334 Answers

Does it misfire under load like when you press on the gas peddle after slowing down then accelerate or at idle. When you say spark plug did you mean all the spark plugs?

Posted on Nov 24, 2008

  • Greg Wilkins
    Greg Wilkins Nov 25, 2008

    You may have an open plug wire. Let me explain when you have a load misfire its usually caused by more or less changing your plug gap. It's a separation or a breakdown of a plug wire a plug that the gap is a lot wider on one plug or sometimes just merely not gaping the plugs. Oh yeah it can be leaking plug wires . Fire jumps from the wire to the block.
    Hope this helped
    God Bless Greg


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1 Answer

Does not pass smog at 25mph


IT FAILED AFTER THE CAT TOO?
NO RESPONSE
SO

POST THE FAILED REPORT
THERE IS NO HELPING ANYONE LACKING THAT.
CO =
HC=
NOX=
-----
IF PRESENT
CO2=
O2=

DATA MATTERS. BIG TIME.

WHY GUESS?
WHY GO BROKE DOING ALL THAT.?


The engine is running real bad.
this is a fact.
due failing with new cat.
so....
scan it yet
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or ask you mechanic to do that, he knows how.

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I HAVE A 2004 ACURA MDX, PUT SCAN TOOLS TO READ CODES. THE CODES ARE ALL CYLINDER MISFIRING DETECTED RANDOM/MULTIPLE CYLINDER MISFIRE...NOW I CHANGED THE SPARK PLUGS, NGK PLATNUM FROM AUTOZONE, CHANGE THE...


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1 Answer

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