Help

[buckshot1]

hi,fellas!!!!i need some help,my 94 gt is running ruff!But the funny thing about this deal is,it doesn't do it all the time.The car shakes real bad almost like a bad miss,THE exhaust shakes and vibrates the hole car i have a scroll computer and every thing comes back fine.I was thinking it might be a injector going bad?It might run fine for 2 days and the next day its back again.I'm hoping someone else had this problem.

 

[mo_dingo]

hi,fellas!!!!i need some help,my 94 gt is running ruff!But the funny thing about this deal is,it doesn't do it all the time.The car shakes real bad almost like a bad miss,THE exhaust shakes and vibrates the hole car i have a scroll computer and every thing comes back fine.I was thinking it might be a injector going bad?It might run fine for 2 days and the next day its back again.I'm hoping someone else had this problem.

Does it get any better when the car is warm? What about when you first start it???

Start with the simple things. Make sure all 8 plugs are getting spark, make sure timing is right and dizzy is tight, check cap/rotor, main battery connections and main ground, clean your MAF & clean/index your IAT. Check fuel pressure and vacuum at idle. Then yank all 8 plugs and note which cylinder it came out of, and what the plug looked like (i.e. dirt brown, black, black and oily, dirt brown with some white, white, etc)
Scott

 

[RIO5.0]

Check your balancer too...she may be on the way out if it got some miles on it..

 

[buckshot1]

Check your balancer too...she may be on the way out if it got some miles on it..

But she doesn't do it all the time.It's the crazyest crap i'v ever seen.I'v done everything but clean my MAF and IAT.

 

[mo_dingo]

But she doesn't do it all the time.It's the crazyest crap i'v ever seen.I'v done everything but clean my MAF and IAT.

Then start with them. Clean both and see what happens. My guess is that they are very nasty if you haven't cleaned them in a while.
Scott

 

[HISSIN50]

I would make sure your EGR is not getting stuck open. It will cause the idle to degrade badly if the pintle is getting hung up occasionally.

Good luck.