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Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Chevy
Satisfied Customers: 15465
Experience:  Have owned a repair shop for 25 yrs.
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Chevy Silverado: Had a multiple,random misfire Changed plugs,

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Had a multiple,random misfire Changed plugs, wires intake gasket valve cover gaskets, fuel pressure regulator,coil packs, fuels injectors and fuel filter Still idles up and down and reads misfire This is on a 2002 Chevy Silverodo 2500HDXXXXX8.1 Please help
hi
is the 300 code the only code you get?
does it seem to run well?
tell me all you can
thanks
Customer: replied 3 years ago.

there were more codes it read 1 of 9 it starts right up it just doesn't idle smooth it idles up and down like it wants to cut out I didn't try to take it down the road

how and when did this problem begin?
what were the other codes?
Customer: replied 3 years ago.

it was a month ago it just happened all the sudden that's what surprised me i haven't been driving it i trying to call the one who read all the codes

so
you replaced all coils?,,the wires? intake gakets and the plugs?sense this problem began?
we need those codes if you can get them,,
Customer: replied 3 years ago.

yes, even fuel pressure regulator and fuel filter and injectors I'm trying to get ahold of the guy who has the scanner no answer I'm sorry

thats fine,,just reply bwhen you get them
thanks
Customer: replied 3 years ago.

Thanks, XXXXX XXXXX them for me now. The crank shaft censor was replaced about 6 years ago if that helps. the codes are Po300,po351, po352,po353,po354,po355,po356,po357 and po358 I hope this helps you

hi
sense we get the 300 missfire code and a code for each coil,,,,
i think you may need to replace the crank sensor once again,,but,,the problem here may be the computer itself..im going to give you some tests/checks for the 358,,it is the same as the others but for the different seven cylenders..

please copy and paste the link below to your browser..i have uploaded more info on this there

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https://www.dropbox.com/s/m8nu7b5ojhe6qpc/0721-chevy-8.1-CIRCUIT%20DESCRIPTION.doc

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Customer: replied 3 years ago.

Hi Tim Just found out that three of the coil packs i replaced are no good thanks for your help

that is strange to have 3 new ones bad..
i am glad you got it going
thanks for using justanswer