GTwannabe

I have a 2000 Camaro with an Ls2 swap. The car has a 5-700rpm variation surge. Tune has been looked at multiple times to see if it is in the tune.
No vaccuum leaks IAC and TPS were both replaced.

Yesterday with the IAC and TPS unplugged the car idled GREAT! Replaced both and still surging like a big dog.

Its a 410in motor, PRC 237s w/64cc, FAST 92 intake and TB. Speed density tune. So MAF is out of the question and o2's are disabled.

Any help is GREATLY appreciated. Thanks.

ringram

Who has looked at the tune?
Id be looking there.
Was it the same person multiple times or someone competent?

STLSleeper

Kind of a dumb question, but is the throttle blade set screw completly down or is it open a little bit? I just put and ls3 in my car and went with an Edelbrock 90mm tb and they had it completly closed and it wasnt getting enough air through the tb at an idle, so I raised the set screwup a little bit and it quit surgeng.

Pseudonym

iTrader: (3)

Agreed. I had the same problem until I brought it to a better tuner. He turned off torque management and did a road tune. It picked up 40 ft lbs and 30 hp as well.