2004 Cobra, 28,000mi , recently put on 2.8 pulley and handheld tune.
Prior to doing the pulley and tune the car had K&N fipk and 3" exhaust. Idle rpm was always around 730rpm+/- , never had any issues with idle rpm.
I installed the pulley myself at home and changed out the plugs for NGK TR6 Vpower @ .33 gap. I installed the canned Steeda Pulley tune and started the car in my garage and noticed that the idle rpm was much higher than before but didn't drive the car at that point so I didn't think there was an issue since I didn't let the car warm up.
After installing the pulley and tune and plugs I only drove the car to a tuner to check the canned tune and make any changes necessary. Upon getting the car back the idle rpm is still high, around 815 rpm , and at low speeds it has a bit of a bucking/lunging feel. Is this a problem anyone else has had?
Dyno sheet looks like this 467hp 473tq ;
Prior to doing the pulley and tune the car had K&N fipk and 3" exhaust. Idle rpm was always around 730rpm+/- , never had any issues with idle rpm.
I installed the pulley myself at home and changed out the plugs for NGK TR6 Vpower @ .33 gap. I installed the canned Steeda Pulley tune and started the car in my garage and noticed that the idle rpm was much higher than before but didn't drive the car at that point so I didn't think there was an issue since I didn't let the car warm up.
After installing the pulley and tune and plugs I only drove the car to a tuner to check the canned tune and make any changes necessary. Upon getting the car back the idle rpm is still high, around 815 rpm , and at low speeds it has a bit of a bucking/lunging feel. Is this a problem anyone else has had?
Dyno sheet looks like this 467hp 473tq ;
