00 GT Driveability Problem

[Turkish]

The problem comes and goes. When the car is under a load it will stutter and shake. If I back off the fuel some and then give it more it will clear up. Like it's cutting out or missing.

I've changed the Fuel Filter, Plugs, check for vacuum leaks, new pcv valve, cleaned MAF.

Any ideas?
Bad MAF?
Baf COP's?

 

[SonicBlueGT1]

sounds like maybe COPs to me...maybe an electrical issue..like maybe something grounding out...

 

[WVUAnt]

COPs. They can begin to go bad without throwing a code.

 

[LS1PUSSOUT]

bad coils...

 

[mineralgrey01gt]

they can go bad without throwing a code. I had one go out and a spark plug blow out, and it never threw a code

 

[cheesegt]

junk it and get a ss/z28

 

[spike_africa]

Considering it can be cleared up some by letting off the thorttle on then going back into it I don't think COP's are your problem. I would lean more towards a fuel pressure problem, either to much or not enough but hard to really say over the internet.