I've replaced everything from fuel pump to fuel filter, relay coil, ignition module, cap and rotor. will not start. have spark but low fuel pressure, pump is the 2nd brand new one.

Asked by May 19, 2017 at 07:47 PM about the 1999 Chevrolet C/K 1500 LS Extended Cab 4WD

Question type: Maintenance & Repair

only getting 10lbs of fuel pressure. Been chasing my tail for 2 plus weeks. It's the 5.7 vortec.

2 Answers

77,955

Does the fuel pump run, when you turn the key to the on position? Can you hear the fuel pump? Your spider injection assembly probably is leaking and would need to be replaced. This is a common problem with those year Vortec engines. The new spider injection assembly has ben upgraded.

107,565

Yep that or the fuel pressure regulator is stuck in bypass.

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