Have a 91 crx s1 with swapped obdo b16a. Car has brand new tps sensor, MAP sensor, new throttle body, a fuel pressure regulator and brand new fuel filter. Problem has been on going since car was purchased any ideas on what it could be?

 

Yeah you need to either set your idle screw/timing or you need to set the voltage for the TPS.

 

Aftermarket throttle body no idle adjustment screw. TPS voltage is fine .45 and .50. Have also been told it could be the lack of a second o2 sensor that isn't present on the car. Has one on the exhaust is one also necessary on the headers?

 

That won't make it die. It will just not run in closed loop. Also that must be some cheap *** throttle body if you can't adjust the idle RPM. Do it by the cable I guess...

 

unless you're running obd2 for some reason that's not going to be the problem. did you try changing or even cleaning the IACV?

 

Yes has brand new IACV as well and have cleaned FICV as well and still nothing.

 

Adjust the throttle stop for the butterfly if you have no idle adjustment screw.

But honestly, WTF kind of cheap TB has no idle adjustment screw... The Pro Products TB (which I have) is cheap and works well.

 

I have this same exact problem i have a bdl 68mm throttle body. b16a converted obd1 changed the iacv 2 times. Someone told me it could be a air bubble in the coolant. Im going to try and bleed it out.

 

anyone?

 

same problem 94 b16a in a 89 crx and idle will run fine then the idle will drop then pick back up and it will continue to do this for a while. I've tried the coolant thing but no results and Ive done all the things talked about in the early posts as well.