The good news is I have found the main problem, sort of! All you who assisted and said vacuum leak were correct. But where the leak is caught me off guard.

In tracking every vac line I came to the large line connector to the left of the throttle body air intake that goes into the intake manifold. Upon pulling the line and plugging the tap into the manifold my idle immediately smoothed out. The motor purred again! By this time the engine was warmed up.

Tracing down hose from there looking for a vac leak I tested every hose and connector under vac pressure. Every hose OK. Not a bad hose in the entire system. Then I reconnected it one section at a time. When the C4020-13554 Warn up regulator was reconnected it went ruff again and I had major engine hesitation on acceleration.

It appears that I have a vacuum leak internal in the warm up regulator diaphragm.

Does anyone know if a rebuild kit is available, or will I have to build my own diaphragm parts?

I am certain I can do something as the regulator is not staked together, but it never hurts to get a kit if possible!

trants4md

Scott, glad to hear that you pinpointed the problem. I've got no idea if a rebuild kit is available.

__________________
Fred Hoelzle

Sorry,
never seen or heard mention of a repair kit.
Some are adjustable-- but it takes an experienced, skilled hand. And a fuel pressure guage. Properly applied.

Perhaps Stevebfl can pipe in here--
I'm just a parts flunky.

But NOT a DIY project, IIRC.

Otherwise, hold onto your wallet.

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Todd Haven
Parts Manager
MPH Automotive
Houston,TX

I found a Python (rebuilt) for a $148.00. .

Not certain yet why I should replace it. Just blocking off the vacuum has made this thing run better than I think it has in years! Ha! Ha!

But oh well, the wife will complain about every tick tock if I don't put a new part in it. I would pay the price somehow, sometime if I didn't!

Scott,

I tore into a few of my shelf enrichment compensators recently to kludge-together a replacement for one of my SLC’s.

Their whole point is to alter control P for warm up, and under load, and that’s all. If your car is working great without the vacuum feature, just go with that because there is a whole potential problem in adjusting the thing to properly control the control P that, if you are otherwise doing great right now, its just not worth messing with.

Best,

Mark