STARTNG PROBLEM ON AN ISUZU NPR TRUCK

  • Tiny
  • corvette johnny
  • 2003 Isuzu NPR
  • V8
  • 2WD
  • automatic
  • 50,000 miles

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.

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Thursday, December 16th, 2010 AT 2:49 PM

1 Reply

  • Tiny
  • KHLow2008
  • Expert
  • 41,994 posts

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

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Thursday, December 16th, 2010 AT 8:12 PM

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