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03-20-2011
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
03-21-2011
You need to scan to see if you have a misfire and what cylinder it's on.
03-21-2011
I'll try it. ThanksOriginally Posted by BillBoost37
03-21-2011
Maybe the convertor is clogged ?
Thanks
03-21-2011
that's what i was thinking, yes.
03-21-2011
It runs fine cold then warms up and starts stuttering.
03-21-2011
Could be a converter, could be KR, could be a weak fuel pump.
03-21-2011
Yea, I could see that. Thanks
03-21-2011
When you say that it is shuttering when accelerating when warm
03-21-2011
Yes, only when warm.
03-21-2011
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?
03-22-2011
How old are the plugs and wires?
| 95 GTP 215k | 97 GPGT 169k
03-22-2011
30k on the wires and plugs.
03-22-2011
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.
03-22-2011
I'll have the time Thursday and Friday.
Got a place to start now,
Thanks, you guys are very helpful
William
11-18-2011
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.
12-11-2011
unplug your mass airflow sensor and give it a try.
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