There are several sensors that control the fuel mixture, but I think your problem may be a fuel pressure rregulator problem. Try this, put a c-clamp on the rubber part of the fuel line when the truck is imediately shut off, then let the truck sit idle and then try and start it, if it fires right up then it is loosing pressure due to a bad fuel pressure regulator, also if there is gas in the vaccum line that is the problem.
How long does your fuel pump run after the ignition is turned to the on position.
Also try turning the key to the on positiion and leave it for 5 seconds, then turn it off and repeat this 4 times on the fifth time try to start it if so replace the regulator.
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Sunday, December 9th, 2007 AT 2:11 PM