got a wrx did a few mods like full de-cat, sti intercooler,uprated fuel pump, dump valve and a power tek air filter.The car runs fine but when you rev it to around 3000/4000 rpm and change gear it revs up kind of like riding the clutch anyone got any ideas of wot it could be cheers MO MO

 

Is it doing it under load (moving)

 

yeh thats right at around 3000/4000 rpm when you rev it harder or less than that its seems fine and you get a right good note of the dump valve but at the other revs it s just not right MO MO

 

Sounds a bit like clutch slip to me m8

 

the car has only done 15k but will get it checked cheers MO MO

 

mine did just the same after I fit a vta bov, i was never sure if it was the bov or I just noticed it more with it on

take it off and I bet you think its fine ,

 

My 02 WRX does the same! Its like the car revs when you dip the clutch between gears. I also have a VTA dump valve.

iAIN

 

i have a dv12 bailys dump valve on mine i thought it might be the power tek filter but that was just a thought MO MO

 

Guys

Just for info, my 2003 WRX started doing the same once I installed a straight through rear pipe. I have since read loads of guys complaining about the same but never read a sensible solution.

Let me know if you find one.

Cheers
Gar

 

mo mo

when I had my de-cat fitted the revs went up on gear changes......wierd !!

20,000 miles later it does't seem to have made any difference but the last EcuTeK re-map seems to have cured the oddity

Midlife.....

 

I have a my02sti that does this when i have the vta fitted,When i go back to the o/e dump valve everything is normal.So im guessing its the lack of re-circ air making it over fuel when lifting off to change gear giving a slight over rev feeling.

 

Mine does it, i noticed after i changed the back box, but it could have been doing it before.
Its been asked before, and the answer was they all do it, its normal.

 

Guys

I t aint normal on a standard motor so the pipe / dump valve change must be affecting the fuelling somehow

 

mine does it as well,i always thought it was me dipping the clutch to early while i still had the foot on the accelerator when changing gear,but i then noticed if i lift my foot off the accelerator and not dip the clutch or change gear it still just slightly seems to rev up,mine is a my01 with just prodrive exhaust and panel filter,no dump valve.