Rough Idle

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Oct 17, 2003 | 09:35 AM

skidmarc

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Drifting

Joined: Sep 2001

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From: Ocean County NJ

Rough Idle

Anyone have a rough idle with GM perf Wires and Bosch Platinum +4's? Misfire trouble code P0300?

I changed fuel filter and ran fuel system treatment through...still get the rough idle....only 13k on the clock!!!

I have the New AC Delco Professional Iridium plugs to put in...hoping that may solve it????

If that doesnt do the trick I may go back to a fresh set of stock wires... :confused:

Oct 17, 2003 | 10:54 AM

carpe dm

Le Mans Master

Joined: Oct 1999

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From: Tucson AZ

Re: Rough Idle (skidmarc)

It could be a bad wire, or a bad plug. Most likely, though, is a wire that is (was) not completely connected. Make suren they are fully seated on both the coils and the plugs.

Oct 20, 2003 | 08:28 AM

skidmarc

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Drifting

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From: Ocean County NJ

Re: Rough Idle (skidmarc)

thanks...I checked and fully seated!

Oct 20, 2003 | 08:32 AM

pewter99

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Re: Rough Idle (skidmarc)

I see you lowered your fan temps, so I am assuming you have a programmer of some sort.....have you tried going back to stock and then reloading the program??? Had to do this before when the car "got lost". Fixed it for me :seeya

Oct 20, 2003 | 08:50 AM

vetterdstr

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Re: Rough Idle (skidmarc)

Check your coils with a timing light to make sure they are firing correctly.

VR :cheers:

Oct 20, 2003 | 09:26 AM

skidmarc

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Drifting

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From: Ocean County NJ

Re: Rough Idle (pewter99)

the stock program was reloaded...still no good...I will have to check the coils......what is the correct Idle Re-Learn procedure?? I here many different variations...???? :confused:

Oct 20, 2003 | 11:36 AM

BSiegPaint

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From: North Royalton, OH

St. Jude Donor '06-'07

Re: Rough Idle (skidmarc)

Idle relearn - turn key to ON. Pull fuses 16 and 23 under the hood. DIC will indicate ABS error and you should hear a ding or two... Turn key off, reinstall fuses, start car and let it idle until it reaches proper operating temp. Drive for 30-50 miles varying speed and gears, etc. Should be all there is to it - just did it myself over the weekend.