ntrida96

I have a 96 gt with stock engine....5 speed....i installed a procharger p1sc intercooled system....190lph fuel pump....lightning 90mm maf....42lb inj....when i installed a custom tune for my sct programmer the idle will jump up to 2200 when i hardly touch the gas....idle stays there for 3-4 secs....i cannot keep the rpm at a continuous level....stock tune it does not have a problem with that just really rich/loading up....in custom tune i unplugged iac and idle problem clears right up....any1 have any ideas???? thanx

fausty

When you say custom tune do you mean like a shop dyno tuned it for you?

H0SS302

Most likely one(some) of the functions is off in your custom tune. Send it back to whoever did it and tell them whats up.

ntrida96

i bought a mail order to try it out....now it is at a dyno shop right now and he has loaded diff tunes and idle still the same

H0SS302

Run a test on that MAF and your TPS sensors to make sure they are putting out the proper voltages.