Very high idle, High idle Options

[sbruzek]

My 1973 2.0 has a very, very high idle. 30000, even higher to 50000, if you disconnect vacuum hose at aux air looking for a leak, or stuck. Only thing that lowers idles down a little, to 25000 or so, is disconnecting vacuum line to the pressure sensor. Pulling off any vacuum lines and plugging them don’t lower the idle any.

This started after I replaced one leaking fuel injector. I did put on new seals with the new and old injector on that side. All the vacuum lines are new and vacuum is very good and strong on all vacuum lines. Pressure sensor holds a vacuum fine.

Any suggestions?

I did set timing to red mark per manual as I noticed distributor moved a bit when working. It was a bit loose so I set timing and tighten distributor down good. But had to set timing at 25000 rpm as I could not get it any lower at correct timing marks.
I do have an oil leak at the oil cooler seals that is getting worse. Is that a vacuum leak?
Starts up great and runs good just have a crazy high idle.

Steve B

[BeatNavy]

Most likely you still have a vacuum leak somewhere. Perhaps a hose is connected incorrectly. Timing that is too advanced can cause a high idle, but not as high as you describe. Oil cooler seals leaking won't cause a vacuum leak.

I'd verify you got the injector seal, and injector itself, seated correctly, and then I'd reference a 2.0 vacuum line diagram and go through it again. Pay particular attention to connections to/from AAR, PCV, MPS, and decel valve.

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