What prom code should be on my prom if it is stock? My car is a 1992 RS B4C. It has the LB9 - 5 speed.

I have searched this site but cannot find it. Please Help!!

My urgency is this.....

My car does not Idle correctly. The idle oscillates from 800-1200 RPM. When hooked up to my Tech 2 tool (yes, I own one) the IAC is at 0 counts. should be around ~8-15 I think. It sounds like a vacuum leak, but I have replaced the entire gasket set on the TPI including the intake manifold and injector o-rings. I have done all the checks in my Helm shop manual. I have replaced the IAC, TPS, O2 sensor, MAP sensor, PCV valve, EGR solinoid, performed a vacuum check on the EGR valve, replaced the distributor gear, sprayed the engine with carb cleaner to try to locate a vacuum leak, and flow benched the injectors (all within 3% of each other). Trust me, I have done everything I can to figure this out. I have to believe that the problem is the computer. I am wondering if the cops pulled the prom out of the car and replaced it with a genaric one which is why I need to be able to identify the prom.

 

I found the problem. Bent throttle pulley/arm. Rebent and adjusted the throttle set scew, and everything is fine.

I would still like to see the what the correct E-PROM is for the car.

Can anyone help?