stryker

Hi as title, after fitting my FMIC the engine seems to idle erraticly.. Is this common?

saiklon

Air leaks in the plumbing for the FMIC. Pressure test to find the leak.

alcazar

iTrader: (2)

You had the map tweaked?

TonyBurns

iTrader: (3)

What model/year car?

Tony

stryker

Hi sorry the lack of info posted at 4am.. The car is a 1998 sti type r.. Not had the map tweaked.. How do i pressure test to find the leak?

Myles

iTrader: (40)

I'd imagine the map tweak is the way forward. Has the car ever been mapped?

stryker

Yes car was mapped before i had bought it.. Its running on a apexi power fc ecu..

timthebat

iTrader: (14)

from experience it sounds like a boost leak

stryker

Would a boost leak affect performance? I feel the car is down on power

petedotuk

You cant map around it if it was running fine before fitting the FMIC. You most certainly have a leak and it will effect performance.

Start the car and listen/feel for any leaks, check all silicone joiners.

timthebat

iTrader: (14)

I would check your turbo inlet pipe aswell, particularly around the maf if a maf tube was part of the FMIC kit. Thats what it was for me anyway. HTH.

Jolly Green Monster

iTrader: (4)

What dump valve are you using? Most likely causing a leak on idle.

Will require remapping for fmic also, but shouldnt effect idle.

Simon

stryker

Will check which dump valve.. Will not remaping affect the the performance/running of the car?

Jolly Green Monster

iTrader: (4)

Yes of course remapping is essential and will effect it but the throttle is closed on idle so he car should idle with out issue as the air is drawn through the maf via the idle valve which is plumbed into the inlet pipe.

I suspect the dumpvalve you have fitted with fmic is openning on idle.

Simon

stryker

I have noticed that it only idles eratically only after i have driven it hard and let it idle.. When i drive it normally its fine..