OWNER SILVER IMPREZA TURBO WITH PPP ON WITH K+N INDUCTION
KIT FULL STAINLESS EXHAUST TO TURBO 1998 MODEL, WHEN COMING TO
A STANDSTILL THE REVS DROP TO ABOUT 600RPM THEN GRADUALLY
RISE TO 800RPM
ANYBODY ANY IDEAS WHY ?
PS WHAT SHOULD THEY TICKOVER AT ?

 

Does it stall sometimes? If so it could be a dodgy MAF sensor , try a search on here as I'm sure I've read about this before.....Greasemonkey ???, over to you

Dave

 

never stalls
thanks for info

 

my uk turbo kicks over at around 800 revs when fully warmed up if this helps. can be as high as 1.2k revs if it is really cold.

 

Sounds normal for a coldish engine.

 

LOL why is when someone mentions a possible fault someone pops up saying its the MAF??

A vacuum leak could easily be the fault.

Nothing seems odd about what you've said, unless the engine seems to nearly stall, or runs roughly before resuming normal tickover

 

Same thing happens to me sometimes, will be interested with responses!

J4CK50N

 

My advice is sell it and go a buy a proper car, go get yourself an EVO.

 

Bit "max power" though arent they.

MB

 

Check MAF and lambda sensors.

Idle RPM spec is 800+-100 RPM for 97/98 UK turbo.

 

agreed, same symptoms here, one MAF (£75) and 1 Lambda (£25) later and it was all smiles again.
While your doing it take the time to clean and regrease the idle solenoid.
it IS worth the £100 outlay.