I just swapped my EG from OBD1 single cam to OBD0 B16A.. I got the OBD1 manifold and headers for it so everything is OBD1 now. I used a P72 GSR ecu at first and it made the car idle at 3K, then i went to a P28 and the car idles atlike 1500 and surges to 2K at a stand still ... Is it the mapping og the ECU (the GSR was burnt out with no chip[ so yea i threw that away) but if i go P30 will the idle surge stop?... i kno when i was using the GSR ecu there are 2 holes in the left side of the throttle boddy, and when i plug them up with my fingers it idled down. Will going with a P30 fix my problem or do i have to go nuts to find a vaccuum leak?

 

the top hole in the throttle body is for your idle air control motor,the bottom hole is the air passage for your fast idle thermo valve,which is like a thermostat that lets air past the throttle plate to bump idle up during cold starts-what i would do is run the right ecu and take the little round plate off the back of the throttle bdoy and use a flat screw driver to adjust your fast idle while the engine is running but still cold,should solve your problem

 

dont get use P28 ecu..it will make u car run rich...get the P2T ecu..its good..

 

Make sure your Intake Manifold is bolted down tightly

 

check for vaccumm leaks if not leaks turn on your car get a can of break cleaner and spray it around the IM when you spray it around the IM and the idle goes up you have a vaccumm leak from the IM its self