Question about 1984 Cadillac Eldorado
On a 84 carb model non computerized there are only two reasons a vehicle will run full rich ( black smoke). If the carb float is stuck open. What happens is a small piece of varnish gets on the fuel shutoff pintle and the bowl overfills. The height of the fuel in the carb regulates how rich a car will idle and cruise. WhatI would do is remove the top of the carb being carful notto mess up the gasket. Remove the pin for th float carefully catching the valve as it falls out. The inspect carefully with a magnifying glass the valve and where it seats on the chamber.
The second reason is a fuel pump thats over pressureized.
Also by now the plugs may be pretty fouled out again and the added strain of the coil trying to fire a weak ignition could of caused it to fail or at least become weaker. So be aware of this when you end up having a no spark condition.
Posted on May 30, 2010
It sounds like a bad fuel pressure regulator diaphragm, which is flooding out the engine. And probably the spark plugs are fouled out, caused by excessive gas from the bad pressure regulator. Here's a picture of the regulator diaphragm. It is part of the throttle body, but is replaceable.
Posted on May 26, 2010
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Posted on Jan 02, 2017
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