high starting idle problem
 

i've searched for this thread but i couldn't come to a conclusion about what to do. i really only knoticed this problem occurs in the FC's...anyway what happens is when i start the car from a cold motor, the rpm's start gonig up to 2500 right before spooling the turbo. its really annoying having this idle problem and was wondering what could be wrong? I just bought the car and its got, apexi bov, hks cf exhaust, hi flow cat, profec b boost controller, aluminum radiator, ast overflow tank, and blitz turbo timer. after about 20 seconds or so of idling that high, it goes down to normal around 1000 rpm...
i was thinking that there maybe some sort of leak in the vacuum lines...so i'm planning on replacing all the hosing with silicone hosing. any opinions and/or thoughts are gladly appreciated thanks!
-Dan

That is totally normal, and not very good for the engine. As part of the stock ECU warm up system it has whats called the acclerated warmup system (AWS). It does exactly what you desribed, and it designed to get the engine warmer faster. Simply tapping the throttle brings it back down to normal levels.

pheww...man being new to rotary scares the sh*t outta me...thanks a lot...but you said its not very good for the engine, so just by tapping the gas, will it fix it? thanks a lot...
-Dan

You can also eliminate the AWS and and replace it with a 330Ohm half-Watt resistor.



Or start your car in gear.

It isn't good for the engine just because running at all when cold is not good for the engine, and revving while cold is even worse. Theres nothing you can do about driving it cold except take it easy on it, but there really is no need to rev it at idle as the ECU does for you.

Yes, tapping the gas will bring it back down. As will starting the car in gear, as Jonski pointed out (forgot all about that).

Don't be scared by rotaries, just be intimidated but willing to learn.

by far the best quote....ever, just tested it out and its exactly as you said. i'd just rather have it warm up in lower rpms then having it at 2500 and loud as hell...it set off my damn alarm on my other car...thanks a lot

-Dan