[tdog]

i have a problem. my mass air signal to the pcm is spiking really bad.The m/a is a brand new pro-m mas air.I have checked all the wires with a meter they are fine,what is the deal the car is bucking really bad because the signal is all over the place anyone have any input?

[tire]

go to a chain auto store and have them scan it. come back and tell us the code it throws. i remember an online code directory and i'm sure i can find it again if i know what i'm looking for.

not to insult your intelligence, but you have checked for a good seal, and the vac lines, right? what do you mean spiking on the pcm-maf line? Pro-M has had some probs but not what you are talking about if there is an elec. prob.

austin

[ccs]

Originally Posted by tdog

i have a problem. my mass air signal to the pcm is spiking really bad.The m/a is a brand new pro-m mas air.I have checked all the wires with a meter they are fine,what is the deal the car is bucking really bad because the signal is all over the place anyone have any input?

To truly diagnose that problem, a digital oscilloscope waveform is needed, referenced to rpm, on a long high gear run on the dyno. Are you seeing a spike , when you rev it, or what?