1990 Toyota Corolla Q&A
1990 Toyota Corolla Question: my 1990 Toyota corollas idle is revving up and down why?
This may sound crazy but make sure it is FULL of coolant!! Check the radiator and FILL it up! If you need someone to check it out i can do it next week, i am just up the road! Post the results. - pushrod
Vacuum leak or faulty IAC and blown headgasket by now? - ziptie12
Your Idle valve could be the issue - Vinoo