So my for some reason my car doesn't idle properly. Its running a hondata s300 on boost. It ran fine before but for some reason it's acting up.

The problem starts when i start the engine and when it gets up to a warm temperature the idle starts jumping.

When i rev the engine it goes but when i let go of the throttle it drops very low from 3000 all the way to 500 and nearly chokes.

So far i've cleaned out the IACV, check all the vacuum lines, check timing, reflash ecu, check throttle cable.

And nothing seems too work

My only other thought would be either it's my MAP sensor, TPS or fuel injectors.

Any help would be greatly appreciated.

 

Anyone experience this ?

i guess i can add more details, When im driving, the car seems to stutter alot when increasing the RPM. Also it seems that every gear feels like its first gear when it comes to throttle load.

 

vacume leak?...

 

did you find the fix for your problem? i have a similar issue with the same motor in a ek hatch but no boost. pm me if you have fixed it please. thanks!