gordo 89

[gordo274]

i have an 89 sidekick that is goofing up. it wont idle properly.when heater is turned on rpms increase too high. when decelerating it stumbles.it has 215km on engine, i keep the engine clean,(oil change, valve lash,etc) is my computer shot or is there a sensor going or gone? would appreciate some stating info. thanks

[jtgh]

CEL lamp glowing at key on no start?
if no , skip next question as the lamp is out fix it. (or ecu dead)

CEL on Running?

dead ECU can go to limphome mode, RICH as heck and retarded and will not operate
the IAC idle control valve.


if CEL is on while running , then pull the codes.