Need some help trying to figure out a problem I'm having with my car, it's a 2003 evo 8, after full boost through out gears 1-3 the Rpms seem to suddenly spike up as soon as I engage the clutch to change gear, what could it be ? Possible throttle hang? Boost/air leak? Clutch problem?

Thank you any advice would be appreciated

 

Seems like a possible clutch slipping? When you change gears and WOT the rpm jus shoots up n u dnt go any faster?

 

^ I agree. Slipping clutch. How many miles does it have?

 

No, the cars Rpms actually increase at a normal rate, the problem is only seen after I disengage full boost, mainly when I engage the clutch to change gears, the Rpms spike up

 

My motor and tranny have about 80k miles on them , have a ACT Streetlite fly wheel , with a ACT Xt-SS clutch kit, the car currently makes 337tq and 332whp

 

Then the only explanation I could think of is sticking throttle.

 

Same thing happens to my evo! when WOT shifting in the upper revs, I always get that spike. Like I'm still on the throtle

Clutch is OK on my car, so must be something else

 

Just run a quick log of 3rd gear, open the log and look at rpm cell vs tps cell.

That will answer your question.

 

unfortunetly i don't have the proper tools at hand to run that log, any other advice ?

 

Will do that over the weekend.

If it is in fact a sticking throttle, what needs to be done?