code 42 EST

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04-09-2008, 09:22 AM

vinson74camaro

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code 42 EST

Quote:

hello i have a 91 bonny with the 3.8 vin c lately once or twice a month it will shut down or keep running and backfire i will shut key off three times and will be fine the only code is 42 thanks i have been reading this forum a good bit

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04-09-2008, 06:07 PM

harofreak00

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do you have spark? I would look into replacing your coils and/or ICM

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04-14-2008, 06:31 PM

88bonnsse

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Quote:

Originally Posted by harofreak00

do you have spark? I would look into replacing your coils and/or ICM

i have the same code ( 42 ) now in my 88sse and i replaced the icm and the coils so now im almost 100% positive its the engine wire harness that comes from the icm as it gave me a problem last year so now its time to be replaced completly..

if its not the icm or coils then check you wire harness for rips or tears..

also check the main engine ground wire right under the ignition coil module... that was an issue for me as well...

and im not to sure about the back firing.. i never had that happen with code 42....