Question about 1999 GMC Suburban

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1994 suburban gmc - no start in heavy rain or high humidity

Truck will start in very short periods of light rain but if there is a heavy down pour and it lasts for a while the engine will not fire. As the humidity goes down over time the engine will start trying to fire but it will not catch. If I fire up the old hair dryer and point it down the carburetor for a few minutes the engine will start. The carb has not been cleaned for some time. Is there a sensor in there which would cause the engine to behave in this fashion. The problem started last summer. I have no problems in snow.

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When was the last time the truck was tuned up? sounds like there is a hair line crack in the distributor cap witch in turn lets moisture get in there and it won't start until it dries back out, the heat from the hair dryer is most likely drying out the moisture in the cap seeing its so close to the throtel body. Do a tune up.

Posted on Jul 14, 2009

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Yah for sure.. water in the distributor cap makes the car not start or backfire

Posted on Jul 19, 2009

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