Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Sudden extreme rich condition

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MP81:
I made a quick "jumper" cable (having bags full of crimp-on connectors is incredibly handy) to run between the terminals inside the connector and those on the oil pressure sender to ensure a good connection - fired the car up and right away, the oil light has gone away, and within a few minutes, the choke was totally open and the car was back to its normal self - and not smoking or trying to burn my eyes and nose with nearly-raw gasoline.

The old choke probably wasn't busted - but, I have a new one on there now, and the factory connector, so that is worth it to me (and I have the old one, just in case).

Now I just need to solve the other issue of that funky idle that'll hop up high (it was idling up to 2500 at first - really have to give it some hard revs to drop down to where it should sit. It's almost like a light switch when it changes to start running higher.

jamesF:

--- Quote from: 73ss on December 03, 2017, 09:25:24 AM ---It could be the oil pressure sending unit. There should be one above the oil filter. It allows current to the choke when there is oil pressure. Does the car have the choke/oil light? I had one fail once. Jumped it out.

--- End quote ---

Did not know this... That is some secret sauce.
There is some good info in this thread. The posts by Cliff on testing the Choke by grounding it, and how to set it up initially are great nuggets. Thanks Guys.

73ss:
glad to hear you got it figured out. Some of those models did have a very high fast idle, check the tune up label for fast idle spec. I guess they wanted to get the cat lit off as quickly as possible.

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