What goin on HT,


I drive a 93 hatch with a stock LS motor in the bay. recently my car has been idling really low. I installed a fuel pressure gauge and notice that fuel presure was around thirty PSI. I then removed vaccuum from the regulator and pinched the line. After i did that the fuel pressure went up to about fourty psi. I then reattatched the vaccuum line and watch the fuel pressure drop back down to thirty psi accompanied by the low idle. Im not sure whats going on. the ignition is dead on with timing light. I have no vaccuum leaks (motor shuts off when I place hand over TB) and no check engine lights.

 

bump

 

The fuel pressures with and without the vacuum hose of the fuel pressure regulator connected seem fine.

Is the CEL ON?

Have you tried cleaning the IACV on the throttle body?

Is the breather or PCV hose or the PCV valve clogged?

Have you tried adjusting the idle screw on the throttle body?

 

No I dont have any CEL but Im gonna check the IACV and PCV right now bump

 

also can I add that sometimes I go to start the car and it comes on for a lil bit and then shuts off. feels like the common main relay problem. but if that was the case I wouldnt be getting fuel pressure at all. And when It does come on the idle really low. I notice this proble takes place mostly on warm start ups. Ive taken apart the main relay and resoldered the joints it did nothing. bump

 

try adjusting your tps sensor.. its really easy