STARTNG PROBLEM ON AN TRUCK

2003 Isuzu NPR

Tiny

corvette johnny

December, 16, 2010 AT 2:49 PM

I have a 2003 Isuzu NPR box truck, the fuel pump went out on it I replaced the fuel pump and fuel filter.
Now the truck start and runs, but has to be cranked along time before it starts and when I let off the key it seems to start up, but if I crank and crank it doen't start. Also when I bump the ignition it starts when I let off the key. It has 50 PSI fuel pressure when I energize the fuel pump. It is a 5.7 V8 Chevy motor vortec. Hope you can help.
Thank You.

FOUND 4073 RELATED QUESTIONS

1 Answer

Tiny

KHLow2008

December, 16, 2010 AT 8:12 PM

Have the ignition switch checked. Seems the circuit for ON is not working correctly when turned to crank position.

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