1991 Toyota Celica Q&A
1991 Toyota Celica Question: My car idles high in park and neutral. Could it be valve adjustment is needed?
The rpm gauge is busted but the idle is high in park and neutral. It also surges (goes up and down) a little when at red lights. I have replaced the throttle position sensor and the idle air control valve(new parts). A mechanic also replaced the timing belt because there was 100,000 miles on the engine. I read that It is a common problem with this model car-the valves needing to be adjusted. I just wanted to know If valves could be causing it? I have not checked for vacuum leaks or proper grounding of the two replaced items(iac & throttle sens). I cleaned the throttle body/IAC with throttle body cleaner. Google searches keep pointing to things I have addressed. Any ideas? I'm also getting a 51 obd I code but my AC works fine. - jdadair
Sounds like your idle air control valve,removing and cleaning may work but you probaly have to replace it. - davecallans