2000 Chevy Silverado 4.3 no fuel pressure
#1
2000 Chevy Silverado 4.3 no fuel pressure
My truck was having some problems starting. I cant start it at all now. Got a fuel pressure gauge to check pressure and it reads 0 psi. I am a little suspicious of that reading. I expected it to be below 50 but not 0. I just replaced fuel filter and spark plugs.
One question the gauge that I used hooked up on top of engine towards back. There was a green cap that screwed off and gauge screwed right on. I think I got the right spot.
Any suggestions ideas would be helpful.
One question the gauge that I used hooked up on top of engine towards back. There was a green cap that screwed off and gauge screwed right on. I think I got the right spot.
Any suggestions ideas would be helpful.
#2
CF Monarch
First you have to find out if the fuel pump is running. Check the fuses and the relay for the pump. When you first turn the key on, you should hear the pump run for a few seconds. It is not unusual for a fuel pump to fail. If you do it yourself, only buy a Delco or Delphi pomp. These seem to hold up better than the other brands.
Last edited by oldchevy; December 28th, 2012 at 6:49 AM.
#3
My truck was having some problems starting. I cant start it at all now. Got a fuel pressure gauge to check pressure and it reads 0 psi. I am a little suspicious of that reading. I expected it to be below 50 but not 0. I just replaced fuel filter and spark plugs.
One question the gauge that I used hooked up on top of engine towards back. There was a green cap that screwed off and gauge screwed right on. I think I got the right spot.
Any suggestions ideas would be helpful.
One question the gauge that I used hooked up on top of engine towards back. There was a green cap that screwed off and gauge screwed right on. I think I got the right spot.
Any suggestions ideas would be helpful.
Last edited by tech2; December 26th, 2012 at 10:53 PM.
#4
Thanks for response. I can hear the pump running after I turn key on. Is it possible for it to turn on and still read 0 psi? Just so you know this has been a gradual deal where my truck was having a a hard time starting in the morning then after a few hours then not at all. I replaced fuel filter at first sign of problems. It tries to start is getting spark air filter clean. I am stumped
#7
Ok so I found the connection for the fuel pressure gauge. I hooked it up and turned key on and tried to start truck. The reading was 0 psi. I tried cycling the pump by turning it off and on a few times. Still no pressure at all. I still did not trust the reading so I decided to disconnect the fuel line just past the tank and before the fuel filter. I recieved a reading of 48 psi after cycling pump about 20 times. From what I understand I need at least 50 psi to start truck. I assume that the reading is stronger just past the pump than it is all the way to the engine. Looks like pump is weak and needs to be replaced??
Any ideas or suggestions are greatly appreciated.
Also, if I need to replace pump is it in the tank?
I think if it is I am going to cut the bed and make a hatch.
Thank you
Any ideas or suggestions are greatly appreciated.
Also, if I need to replace pump is it in the tank?
I think if it is I am going to cut the bed and make a hatch.
Thank you
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#8
Yes your pump is in the tank and you will have to drop your tank to replace it. You'll also probably want to replace your fuel filter along with it as well. I think the manual says to replace it the filter every 30,000 miles or so. for me it's (02 silverado) underneath the driver side and is fairly easy to get to.
#10
Super Moderator
Professional Mechanic
Professional Mechanic
Why would you HACK the truck up? Either unbolt the bed and slide it out of the way or remove the fuel tank. Neither are very hard to do