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car stalls and won't run 140-160 1971

posted by  Phil S. on  Sun Jun 6 07:38 CST 2004
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last visit: Fri Oct 24 13:18 CST 2014
[RELATED]

Check the spark plugs after it stalls. My bet is that they'll be black and wet from over-rich mixture followed by flooding.

Possible cause: The return line from the pressure regulator to the fuel tank is blocked. This causes fuel pressure to gradually increase until the motor floods. Let it sit for a while, and the pressure slowly bleeds off through the blockage and you get another normal start.

Check the fuel pressure with the motor running.

Removing connectors from the sensors defaults to a signal that increases richness, and aggravates the problem. A failed coolant temp sensor (or open associated wiring) will cause a very rich mix, but not usually enough to stall the motor.






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