Idle + Boomba problem
 

Hi guys, i hope you can help me...

i just swap some parts...


i had 70mm fullblown tb, JMFAB Intake Manifold, now 75mm Boomba TB and AMS F1 Manifold

now i have some idle problems... cold is perfect... 1200-1500 rpms and good AFRS, but when the evo is warm the the rpms bounce between 1000 and 2000 rpms and the engine die...

i just checked with evoscan and the problem start at 80C degrees

i don't know if i need to adjust the speed density tables...

after boomba tb and ams manifold the idle was perfect.. 1000-1200 with no problems...

i hope you can help me...

Check the throttle stop screw. I have an s90 throttle body and had hot start issues.....turns out the stop screw wasnt set correctly and the throttle blade was completely shut.

{thumbup}

Also, check for boost leaks when car is warm. It may be totally leak free when cold and as it heats up a leak is created. Did your torque the mani to specs? New gaskets?

boost leak free, new gasket, everything is fine....

i just adjust the ISCV Initial step position with ac off table and now the idle is fine..

now the problem is when i rev the engine the rpms go up and then fall to 300-400rpms and the engine die...

do you think is a boost leak??

That would have to deal with you iscv settings and idle stepper table.

Hey man, I know this thread has been in the darkside for a while, did you ever found the problem. I am having the same exact thing.

I know I am not the original poster, but I am about to purchase pte1200's since my cam is helping max out factory injectors at just 15lbs. Hopefully no news is good news, but I am going to send my info to Tom at TScomp to get my car up to speed when I get going with parts.

Anyone ever solve this ?

Was this issue solved?

Having the same problem. Can anyone confirm if the boomba TB has a biss like screw to adjust idle?