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The distributor’s timing is curved for use with EGR. The mechanical timing in the distributor is more advanced to account for the slower burning charge of EGR gas. When the EGR valve is disabled, more oxygen gets mixed into the air/fuel mixture, which burns faster (and hotter) so the...

They are, but “totally “ is the correct word. How you have it hooked up now, the HAI system is inop (which isn’t really an issue in warm climates) along with the Hot Idle compensation and the distributor venting plumbing has been disabled The distributor venting plumbing HAS to be fixed...

You need to get a vacuum gauge. Required equipment for this engine. You can get one at any auto parts store. It’ll show what the engine vacuum is and let you know if there’s any vacuum leaks. When the engine is warm, the choke no longer is a choke but a throttle positioner. Pulling out on the...

See the EGR system in the emissions manual. There’s a few extra components it requires. Since yours is all capped off, leave it as is. It was disabled likely because it was malfunctioning. That broken VSV on the driver’s side engine bay was indeed used to control the AC system idle up. Since...

@robcgray Your vacuum hoses connected to the distributor and HIC valve are totally wrong.

Your EGR and bottom of HAC valve (red thing) are not vacuum leaks.

Yes - see drawing. It looks like the previous owner removed the HIC valve and replaced it orientated 90° out. Normally its L pipe points towards the rear so the hose connects to it in a straight path.

That tee fitting should have a hose connected to it and the HIC valve under the air cleaner cover. If your HIC valve is gone or inop, plug that tee fitting pipe that’s connected to the PCV valve. It’s a huge vacuum leak when open. That’s why the engine isn’t idling nice.