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

 

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

 

You had the map tweaked?

 

What model/year car?

Tony

 

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?

 

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

 

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

 

from experience it sounds like a boost leak

 

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

 

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.

 

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.

 

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

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

Simon

 

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

 

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

 

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..