Starting about a month ago, when i put my car in gear, sometimes it starts to stutter from 1st gear all the way to 6th. it does it from about idle to 2,000 rpm and it just feels like the engine is struggling to get going and i have to floor it to get it to stop. And then it idles quite irratically. it'll go all the way down to 500 RPM and then rev itself up to 1,300. The car is almost undriveable sometimes but it only does it sometimes so when i took it into my mechanics shop, it didnt do it at all for him so if anyone has any ideas on what the hell is going on that would be great because it it really starting to annoy me quite badly......

The car is a 98 Trans Am WS6, M6, True Duals, and Pacesetter Headers

 

Is it throwing any codes???

 

sounds like a mass air flow problem to me. need to check and see if any codes are set

 

Spark plugs, wires, fuel filter, fuel injector, a engine sensor reading wrong. There's many things it could be. I second the checking for codes. Even if the SES lights not on. Also find out if a cylinder is misfiring which I think it is.

 

alright i got the ses codes, there were 6 of them!! 2 were doubles though.

P0135
P0155
P1133
P1153

Any ideas?

 

P0135- HO2S HEATER PERFORMANCE BANK 1 SENSOR 1
P0155- HO2S HEATER PERFORMANCE BANK 2 SENSOR 1
P1133- HO2S INSUFFICIENT SWITCHING BANK 1 SENSOR 1
P1153- HO2S INSUFFICIENT SWITCHING BANK 2 SENSOR 1

Looks like your front O2 sensors have both taken a crap on you. The same thing happened to me. Change them and if that doesn't work you're looking at wiring or in the worst case a pcm. Or if you just put your headers on a pluged your simulators into the front O2's instead of the rear. But i don't think you did that.

 

I've had all 4 of those codes at once before. Two of the bosch o2's part # 13111 fixed it.

 

when ur car was pullin all the same codes did it also have the same symptoms?

 

My car had the same symptoms you're describing. I changed the two front o2 sensors and the problem went away. the car actually died on me once when i just didn't want to idle. The way i really knew it was the o2 sensors was when i looked at fuel trim and an entire bank would go lean in a heartbeat, but not the whole engine. It's the o2 sensors.