every morning i start my car and its at 2500 and as a warms up, it goes back to idle. does anyone know whats going on?

 

its part of the program in the ecu to help the engine warm up faster and keep it running on those cold starts

 

so its electrical? i was thinking the fast idle valve or something. i have a b17a in my crx converted to obd 1

 

2500 is a little high actually. what does it idle at normally? what kind of plugs are you using? fuel pressure?

 

inspect the fast idle valve, which is either mounted to the throttlebody or on the intake manifold near the TB.

 

Tighten your idle adjustment screw. When the engine is at "normal" operating temp. then adjust your idle screw to the 700+/- 50 rpm. Then recheck when the engine is cold again. Then if you still have a idle above 2000 rpm, it's either your "fast idle thermal valve" or it could be your ambient temp. What's the outside ambient air temp. when you have your high fast cold start idle? If you want to check your fast idle thermal valve, remove the air intake, and slowly start to close off the hole inside the throttle body. It's the bottom one of the side with two, you can open the cover for it and there will be a white plastic tube you can thread in, sometimes they get loose and fall out completely.

 

mines usually around 1,400