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Old 11-07-2021, 08:52 PM
markpj23 markpj23 is offline
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Join Date: Sep 2006
Location: Las Cruces NM
Posts: 390
Default Progress - But Still Lousy

So today I pulled off the Holley and installed the Qjet. Got the idle mixture adjusted for best vacuum but it still ran like crap, wanted to stall out, etc.

Rethinking where I started from, I decided to retard the timing again back towards where it was at the beginning. I didn't go too far back - it's now around 2 deg BTDC and running better. Idle is better but still not smooth. Went for a drive and response is WAY better when I put my foot in it, but steady speed still misses & bucks a bit.

One issue I have is too fast an idle even with the idle speed screw backed out all the way. Went for a short drive and the engine does not slow down as it should when the throttle closes. Checked the return spring and that's OK - a little weak maybe but OK. The choke plate is wide open so that's not the issue.

Once when I had the clutch in at idle the engine speed dropped and it stalled out. Restarted and it was back to fast idle again.

Is there an adjustment I'm missing or maybe I have a gasket interference problem? Closing the throttle by hand doesn't result in any more movement - it seems to close via the return spring the way it should.

Sorry this thread has been going for so long....

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Mark
Las Cruces NM
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Current Project:
'67 Catalina Convertible
400 4-spd
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