I have this car that is acting all kinds of weird. Its a 98Z, 347, 23x,24x cam...nothing crazy, 6 spd. Its SD tuned. When cold, the car does fine, but when it warms up, the idle hangs. I taken air out of the RAF, idle trims are good. Throttle Cracker is zeroed out and I have increased the Drive and P/N Decay tables...alot. Idle still hangs.
A local hack installed the intake and the car, according to the owner, "idled at 1500 afterward." I thought, vacuum leak. Nope. Still does it.
He has a UMI TB, I thought, lets try my NW. We changed them out and the car ran PERFECT. I thought it was the TB. Later that night, he tells me it is back to doing what it was before. Damn!
He gets an SES light, so he goes to Vatozone to have it read, TPS code. He didn't get the number, but they cleared it and he said the car ran perfect again....then after 10 minutes or so of driving, went back to running weird.
Its like the car has a vacuum leak, but only when hot....but why would it run good after changing TB's and then again after deleting a code. I'm stumped......any ideas are appreciated!
Thanks
Scott