after i did my swap i started haveing idle problems and i had to get a 0bd0 harness wat can it be let me know?? and its not the iac…
Search, idling has been covered many times. If you still can’t find an answer try describing the problem in better detail (when exactly it started, what exactly is happening, under what engine conditions, etc.).
if you have air in the coolant it will cause idling problems soo bleed it another could be build up on or near your throttle plate or throttle body.but definately if u swapped it make sure u bled the coolant system correctly
or the throttle valve is opened a bit and just needs to be closed. vacume leak could be the other thing. Look for unplugged hoes’s or lines on the intake manifold…