Something weird happened yesterday. Hopefully somebody can help me out.

I was attempting to track the down the source of my oil leak - probably the breather box but that's a story for another day...Anyway, I switched the gasket around and tightened the "teeth" on my oil cap. I removed the large hose from the flame trap to the throttle body area and also a hose (don't know what it's called) on the opposite side of the throttle body to check for oil contamination as suggested here. Also cleaned up leaks at the cap and in the rear main area so I can trace the source. Bear in mind that I have already cleaned or replaced the valve cover gasket, flame trap, ft hoses and intake nipple.

Then I began to run out of daylight and put everything back to together. Fired her up and she's idling at 2000 RPM's or more. Wouldn't kick down. I had to manually adjust the idle down. Still idled high this morning.

My question is assuming the cap seal was bad, did I restore proper vacuum to the system by switching it and tightening the "teeth"? Maybe the computer just needs time to adjust the idle - she did run smooth and strong on a test drive afterwards!!

OR - Is there a coincidental problem with the throttle position switch or plate? Plate out of adjustment or a bad switch?

Or perhaps the gas cable is hanging up?? I lubed the throttle linkage/cables but didn't have time to investigate the gas pedal area.


Appreciate any thoughts/assistance!


Jim 90 244DL

Did you reconnect the throttle position sensor? Did it get out of alignment? Did you tear the air hoseor create another leak in the process?

1. I didn't disconnect the throttle position sensor. Didn't disconnect the throttle body at all just the hoses on either side.

2. Didn't tear the any hoses or create any leaks that I know of.

Did you think I might have dislodged the throttle plate/switch removing or replacing the hoses?

Maybe the throttle position switch coincidentally decided to die??

I also need to take a better look at the gas cable and make sure it isn't binding.

I don't believe it has to do with vacuum/crankcase pressure, do you?

Be certain to look closly at the IAC valve, the all time greatest trouble maker of them all. If that baby gets loose it will let air into the manifold like a monster. And the connector is generally secured with the clip, but if you were handling around in this area it is suspect. God knows how I hate my IAC and all it's problems!!!