my evo3 engine has just been rebuild with engine rebore to bigger pistons.i start the engine,the rpm stays o.k but everytime i floor the clutch and take it for a ride,the rpm started to get higher & higher until reached 2500 in idle.my foreman said there were leaks in the i/c piping & leaks in i/c hoses.i repaired and replaced them but the high idle was still there.i also just cleaned the t/b and ruled out the t/b problem possibility.Can someone please help to fix this??I want my rpm to stay normal on idle.
for your info;
i'm using ogura full race clutch(it seems that everytime flooring this clutch and changing gears during ride,the high rpm happened)
safc (but not fully tuned),
a/campulley (not tuned also),
stock fuel pump,
264 cam only the for the intake,
get rid of the safc and get it tuned via ecuflash. also your Idle air control valve either is not tuned properly. Have you done a boost leak test? this will confirm any leaks you have. Also maybe try adjusting the thorottle cable, if its too tight it will cause the car to idle high.
no,i have not done any boost leak test.will look into it.a friend of mine said that maybe my car's battery is the culprit since he noticed the battery plates were faulty.can a faulty battery cause such high rpm??
battery plate???? the battery is only needed to start the car, should not have anything to do with idle issues. boost leak test, pull the IAC and clean it, then tune the car properly with ecuflash and wideband
Since you cleaned the TB, does this mean that you took it off the car,disassembled it and then cleaned it? If so, when you put it back together, you may not have seated the spring properly. With this it will cause increased tension and your idle will sit at about 2500 rpm. Check that too.
Im pretty positive thats the problem. As you, SicLanEvo, I also was changing my throttle body seals and cleaned the TB, and while reassembling the TB, there is a slot for the end of the spring to be seated in. I totally missed that, and when I started my car, my idle sat at around 2500 rpm and wouldnt come down past that. Easy fix, and as I said before, hopefully that is your only problem.
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