Question about 1988 GMC K2500

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Truck turns over but wont start .checked fuel pump,filter,lines and spark.

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Check all of the sensor wires. Sometimes if they are bad or not hooked up the computer wont let it start.

Posted on Mar 19, 2011

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The logical thought on this would be to ask if you changed the filter, also if the pump is electric and in the tank, was the strainer changed? If EFI have you checked fuel flow before and after the fuel pressure regulator? Can you hear the pump running? Did you check the fuse for the fuel pump?
I'd start by making sure the pump has voltage, then disconnect the fuel line before the filter and see if there's any fuel in the line. Then have someone just turn the ignition on momentarily to see of the pump is pumping. If it isn't you still have an issue with the pump. Finally, if you have an in tank pump, and have installed an external line pump to save bucks, this doesn't always work because there are check valves in some internal tank pumps that prevent fuel flow.

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