cmart40

My 2000 firebird is the most inconsistent car I have ever owned. It will run up to 2 tenths off ? It has 3.42 gears,long tube headers cat and egr delete ,drag radials 165 degree thermostat and has had 2 different tunes by 2 different tuners.

I ran into someone with a similar car and they said they have the same problem, any help ??? could the knock sensors be retarding or advancing the timing ? can I disconnect. I run only 93.5 and can boost the octane if needed.

MaroonMonsterLS1

Auto Car or stick car?
If it has 3 pedals...it's probably your fault

cmart40

Sorry ,it is a 4l60e with shift kit.

Johnny_M

Do you have it tuned with Efilive or HPtuners?
You can make it consistent if you do.

jhshnh

What are your 60’ times? Do they vary or are the consistent?

Johnny_M

Turn off your torque limiters. Turn off the knock sensors. Mount the IAT sensor behind the front bumper. Get a WBO2 sensor. Its prolly on the lean side@WOT. Get an SD tune. Then your car will run consistently. Engine temp should be 180° every time you stage the car.

conexion914

iTrader: (5)

I've fought inconsistency with my car and my wife's. Does it only happen in summer time? Are you able to look at your tune files?

cmart40

Thanks for the tips. I was concerned about the knock sensors.

cmart40

Yes, had 2 different tuners