i have been having a problem with my 87 gta.I have a 87 trans am project car where i use the relays from my gta to solve a problem on the TA. fixed the TA.I put the relays back on my GTA Now i have a problem with gta..ughh! The GTA now has a mis and stumble off the top of throttle.I unpluged the maf power relay and that mis stumble goes away,but i have a service engine light. when i plug the relay back in the mis and stumble are back but NO engine light..I just replaced the MAf power relay thinking that was the problem.

 

MAF is bad, replace it with a new one.

 

Seriously doubtful that a MAF will suddenly go bad, just sitting & not doing anything.

Double check which relay you used for each plug. 2 of the plugs are the same & the relays appear to be the same, but 1 has an extra "circuit" inside it, yet the plugs will plug into either one.

You could try swapping those 2 plugs & I bet it'll be alive again.

 

I went back a forth checking part numbers on here matching them to relays.So as far as i know its all matched rt. Now today when i went to the start it up with the maf power still unplugged it ran the same as it did when i had it pluged in.It only started to run better as it warmed up?