erratic idle on 2000 SL1?

Discussion in 'General Motoring' started by codwall, Apr 8, 2024.

  1. codwall


    Apr 8, 2024
    Likes Received:
    I have a 2000 Saturn sedan with a 5 speed and 1.9 liter 8v. The idle revs and drops repeatedly whenever it decides to. Things I have done so far are:
    Replaced iac
    Replaced tps
    Replaced Map
    Replaced crank sensor
    Replaced ignition control module
    Replaced engine
    Replaced temp sensor
    Replaced fuel injectors and fuel pump
    Replaced intake gasket and all vaccum lines
    Replaced purge valve solenoid
    The idle still revs and you can hear the iac open and close pulling air thru the tiny hole inside the bottom of the throttle body...oh i cleaned the throttle body as well. stil the same idle problem. If i unhook the iac it idles at around 500 rpms but drives great. Im losing my mind on this idle problem. So any ideas? the only code it showed was iac voltage circuit low and purge valve solenoid ..
    Last edited: Apr 8, 2024
    codwall, Apr 8, 2024
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