Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

No start/hard start, engine cold or hot:

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Kenth:
Do you have proper voltage/current to the HEI at all times?

fussfeld:

--- Quote from: Kenth on July 06, 2021, 12:49:49 AM ---Do you have proper voltage/current to the HEI at all times?

--- End quote ---

i would  assume so.   i can get it started---just with a lot of cranking and some pedal.

fussfeld:
i think i need to add here (after unable to sleep at 3pm for a while and had time to think),that the engine just does not want to run below 800 rpm.   So, i feel this is likely tied in with the hot start problem-----If that's the lowest i can get it run and it shuts off at 800, then IF things were normal, if i were to restart it, it would idle at 800.   But it DOESN'T WANT to run at 800----so why would it start?

So, that's the hot start issue.


Cold start?  i don't know yet.

Kenth:
There is no room for assumtions.
A weak ignition system is a good recipe for hard starts and a poorly running engine.
You need to check and verify the ignition system ahead of adjusting the carb.

fussfeld:
i agree that ignition should be checked before carb.   But wouldn't the video tend to indicate that ignition likely is NOT the problem?


Anyways, then, what's the best way to check the ignition?

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