Chevrolet Forum - Chevy Enthusiasts Forums - 1999 tahoe 5.7 with 0 fuel pressure

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Harlan

Feb 1, 2020 9:31 PM

1999 tahoe 5.7 with 0 fuel pressure

I have a 1999 tahoe 5.7 with 0 fuel pressure. Will turn over, but is misfiring and sounds very odd.
I've replaced the fuel pump relay and put in a new fuel pump...I can hear the pump cutting on when I cycle the key...but I'm still getting 0 psi with my fuel pressure guage.

I'm thinking the computer is bad...or possibly a bad ground somewhere.

Anyone have any ideas?
Thanks!

oilcanhenry

Feb 2, 2020 4:17 AM

Quote:

Originally Posted by Harlan (Post 442209)

Perhaps pressure gauge is bad?

oldchevy

Feb 2, 2020 7:18 AM

Did you change the fuel filter or check the fuel pressure regulator?

Harlan

Feb 2, 2020 7:41 AM

Quote:

Originally Posted by oilcanhenry (Post 442243)

Perhaps pressure gauge is bad?

I checked the gauge with another vehicle and it worked

mountainmanjoe

Feb 2, 2020 1:55 PM

plugged filter

Harlan

Feb 2, 2020 2:56 PM

Quote:

Originally Posted by mountainmanjoe (Post 442285)

plugged filter

I put in a new fuel filter when I changed the pump

Harlan

Feb 2, 2020 3:00 PM

Quote:

Originally Posted by oldchevy (Post 442249)

Did you change the fuel filter or check the fuel pressure regulator?

yes...I changed the fuel filter when I changed the pump...ths wire harness to the pump is original...i wish I would have changed it when I had the tank out
maybe it is the harness...when I turn the key on I dont hear the pump....but when I turn the key off..I hear the pump turn on

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