I have taken all the air filter routing hoses out, dialed the idle screw off and then some. Vacuumed out what appeared to be a rodent nest.
Started the 1992 Club Wagaon 351w,a/c,auto
and she is idling wicked fast.
I am thinking vacuum line breach or timing.
I will check both, but in the mean time...
You shouldn't have messed with the throttle hard stop at all!! Disconnect the Iac control wires and see what it does. Did it stall or stay running at a crazy rpm? You need to back the screw down until it barely runs, then plug back in the IAC. You probably have to clean the IAC.
I cleaned all of the carbon out, the travel seems to be ok and it appears to seat properly, but it still idles very fast. I disconnected the IAC, set the idle manually and it seems to like it.
What damage can be caused if the IAC is left disconnected?
I meant for you to disconnect the battery so the computer will relearn, Hook the Iac back up it should go to about 750rpm and then when you put lights on, ac etc it should raise up a bit!! If you got a vac leak as well it will screw with the idle go over all of them especially those hard lines.
what about the voltage at the IAC. I am having a similar problem. Cleaned everything and checked the voltage. Its at 11.6v with the key on engine off when it should be 10.5v. Any ideas? Also I have a code 52, power steering preasure switch and I have read that it adjusts timing, could this affect idle as well?
ok, so its been a while,
cash flow was low...blah blah blah
i replaced the throttle position sensor and the idle dropped to 1412rpm.
the throttle body needed a bath, done.
acetone, what a joke, varsol rules, remove all things electrical first.
the vacuum port to vapour canister was clogged, fully cleaned.
it did pass the emissions test with the following @1412rpm
hc ppm 22
no ppm 340
i am so in the manual override old school zone.
so any thoughts on how to setup a manual override for this idle air control valve?
i want the cockpit of this club wagon to look like the space shuttle!!!!