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Stuttering when accelerating

bigwillie

bigwillie

New member
1998 3.8 Grand Prix 185K on it. Tuneup last yr. including fuel filter. Not showing any codes. I cleaned the EGR valve and the plunger works.(it was carboned up).With the engine cold it runs like new, soon as the temp gauge goes up it will stutter if I press hard on the accelerator. Mileage seems to be normal. Throttle body is clean. One of the coil packs had corrosion on the towers so I changed that. It runs fine if I don't get on it. Alittle rough idling. Any ideas friends?
Will
 






Sorry my phone sent that before being done. Does it do it all the time or when shifting maybe after it shifts? How old are the plugs and wires? Do you have any other issues?
 
have you tried anything yet or are you just waiting for more suggestions that are probably wrong? one of the first few suggestions is probably it.
 
Bio248 said:
have you tried anything yet or are you just waiting for more suggestions that are probably wrong? one of the first few suggestions is probably it.
Click to expand...

I'll have the time Thursday and Friday.
Got a place to start now,
Thanks, you guys are very helpful
William
 


I was thinking it couldn't be plugs or wires with only 30k on them. Auto zone scan said vacuum leak. 185k on original hoses and tubes...maybe so. Finally borrowed Oreillys scanner and it said #1 cylinder misfire. Damn, I changed the plug and it's fixed. Thanks for your insight.
 
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