Do I need engine management?

[narus_l]

Ok, so I just purchased a 96 impreza the other day which has a bunch of work done to it and I am having a very problem with the idle. It idles very rough and if I put it into neutral it stalls almost instantly. The car has a lightweight pulley and flywheel, a unknown brand cat back custom headers and a few other power modifications so I believe the cause for the stalling and rough idle is a lack of engine management causing the air/fuel ratio to be off. Do you think I just need engine management?

[cloudconnects]

i think its from the lightweight pully and flywheel... someone else who knows will chime in

[freeride]

I doubt you need EM but is there any CEL's?


The fly and pulley shouldn't make your car stall or idle bad, is it an automatic?
O2 sensor can cause that.

[Storm]

Sounds like a vacuum leak to me. Do a thorough inspection of all the hoses and pipes in the engine bay. Engine management won't do anything if the basic systems are not functioning properly.

[narus_l]

Its a 5-speed and there are no CEL's

[narus_l]

is there anything I can physically do to raise the idle speed?

[ride4life32]

You should look at your IACV Idle Air Controll Valve...check/replace the gasket and clean the valve (use gas or alchohol to clean it very good then slap it back on) It is located right next to the throttle body. Its a cheap fix possibly if you find out its not due to a vacuum leak somehwere in your system.

[Monster]

spray some accelerant around the intake manifold area like brake clean around a suspected vacuum leak should pinpoint where the leak is