Question about 1999 Chevrolet K1500

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Starting engine will start when cold but will crank for long time when key is turned when engine is hot does eventually start though

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If this is the V8, you might have a leaky fuel pressure regulator that is seeping fuel into the vacuum control line that attaches to it. If this happens then this extra fuel gets into the intake manifold and causes the engine to be partially flooded when an attempt is made to restart it. If the vehicle sits long enough or sits overnight this extra fuel will evaporate away and the engine will start normally. When the problem is occuring It usually will misfire for a bit or even stall once and often there will be a puff of black smoke out of the exhaust when it does restart. The regulator is located on the left hand side of the engine above the intake manifold. It's about 1-1/2" in diameter and about that long with a small vacuum line attached to the end/top of it. If you remove the vacuum line and can detect even a trace of fuel in it [liquid or even vapor] then that is most likely your problem.

Posted on Jul 15, 2010

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