Hey everyone I have a issues with my new Evo. Its currently down because Im doing all the bolt ons but before when I would be driving it under a good ammount of throttle, trying to shift at around 4k-5k rpm the revs wouldnt fall. I could push the clutch in and the revs would stay at the same rpm for a couple seconds then drop down to idle. It wasnt erratic at all like a vacum leak but seemed more electronically controlled

Has anyone had this happen to them or heard anything similar? I dont know the history of the car but I pulled the fuel pump this weekend to put in my wally 255 and low and behold it already had one installed.

 

look up throttle hang, its a common issue apparently for evo 8s and 9s

 

throttle hang, nothing to be worried about, get tuned and it will be gone

 

As stated above nothing to worry about. From what I understand its just the ECU burning off access gas that may be in the combustion chamber when the car is under a rich condition.. basically giving quite a bit of throttle then immediately pushing in the clutch.

 

if it stays at the RPM then i would say you have a Tephra ROM which allows for no lifting off the gas pedal to shift. if it drops at a slower rate then i would say it is throttle hang which is fairly common.

 

Ok well Im getting tuned this saturday will update after that, hoping to join the 400whp club!

 

Just so you know, not all tunes will eliminate the throttle hang. And some tuners dont even know how to eliminate it.

Just be sure to ask your tuner to eliminate it.

 

Ok thanks Im going to Mac Autosport in Colorado. Its a big shop that has done quite a few Evos according to them. I will ask if they can get rid of that

 

Well.. if he had a QM twindisk clutch.. there's no tephra mod. needed for NLSing.. just the driver mod.

 

I forgot to add this as well, it does NOT have a stock clutch from what me and a few people can tell. Its very very firm and doesnt grab until the pedal is almost fully released and it grabs hard.

 

might i suggest carz performace in lakewood for ur tune, great guys to deal with, havent heard much negative from them....