Archie Posted September 9, 2011 Report Share Posted September 9, 2011 My fuel pump in my 2001 Sonoma started to crap out on me so I replaced it (full pump, sending unit, assembly)... The pump will turn on and prime but it won't start. I hit the bleed valve on the fuel rail and fuel came out (it poured out a little definitely didn't spray out). Is there anything I need to do as far as bleeding the lines? The truck ran good before I put the new pump in and it seems like everything hooked up correctly. Quote Link to comment Share on other sites More sharing options...
Rocky31186 Posted September 9, 2011 Report Share Posted September 9, 2011 How much fuel pressure does it have? Quote Link to comment Share on other sites More sharing options...
Archie Posted September 9, 2011 Author Report Share Posted September 9, 2011 I don't have a FP tester, guess I should get one Quote Link to comment Share on other sites More sharing options...
Browning Posted September 11, 2011 Report Share Posted September 11, 2011 hit the tank a few times Quote Link to comment Share on other sites More sharing options...
Cordell Posted September 11, 2011 Report Share Posted September 11, 2011 Sounds like a restriction, did you replace the fuel filter? I have seen pumps fail and come apart clogging the filter. Quote Link to comment Share on other sites More sharing options...
Archie Posted September 12, 2011 Author Report Share Posted September 12, 2011 Sounds like a restriction, did you replace the fuel filter? I have seen pumps fail and come apart clogging the filter. I had to bang on the tank every now and then to get it started. This attempt was to replace the pump before it stranded me somewhere, I don't think the filter got clogged but I could check. The only other thing I could think of is that I got a shitty pump - which doesnt really make sense because you can hear the pump prime and it sounds good. Quote Link to comment Share on other sites More sharing options...
Rocky31186 Posted September 13, 2011 Report Share Posted September 13, 2011 Start by buying a fuel pressure tester and see what KEY ON reads.. plus cranking.. Quote Link to comment Share on other sites More sharing options...
Clifford Automotive Posted September 13, 2011 Report Share Posted September 13, 2011 Where did you get the pump from? Quote Link to comment Share on other sites More sharing options...
Cordell Posted September 13, 2011 Report Share Posted September 13, 2011 Where did you get the pump from? +1 If it ran before you put the new pump in, all be it hitting the tank, then something is wrong with the new one or something got knocked loose in the tank. A fuel pressure gauge needs to be hooked up at this point. Quote Link to comment Share on other sites More sharing options...
Archie Posted September 14, 2011 Author Report Share Posted September 14, 2011 no pressure at the fuel rail... It's gotta be the new pump then - I got it at NAPA, the tank looked clean when I installed the new one. Where would it be "hitting" in the tank? I guess I could pull it out and check that. Quote Link to comment Share on other sites More sharing options...
Rocky31186 Posted September 14, 2011 Report Share Posted September 14, 2011 If you hear the pump kicking on, disconnect the fuel line before the filter. And check fuel pressure there. If you have pressure you have a clog. If you don't, replace fuel pump again. Quote Link to comment Share on other sites More sharing options...
Cordell Posted September 14, 2011 Report Share Posted September 14, 2011 no pressure at the fuel rail... It's gotta be the new pump then - I got it at NAPA, the tank looked clean when I installed the new one. Where would it be "hitting" in the tank? I guess I could pull it out and check that. I meant when you had to hit the tank before you put in the new pump. Sorry that didn't come across very well. Some of those sending units had a little pulse damper thing that was easily torn when putting a new pump in, that would cause your issue but I'm not sure if you have one. Like Rocky said you can check for pressure before the filter, but it sounds like something in the tank. Quote Link to comment Share on other sites More sharing options...
Archie Posted September 14, 2011 Author Report Share Posted September 14, 2011 OK. Thanks for tryin to help me guys, I'm going to make sure its wired right then I'll just pull it back out. Fucker was a pain in the ass to get back in that snap ring assembly blows cock. Quote Link to comment Share on other sites More sharing options...
Archie Posted September 15, 2011 Author Report Share Posted September 15, 2011 Fingered it out, two things to remember about replacing a fuel pump: 1. Don't buy some POS online 2. Make sure you didn't reverse the polarity of the wiring Quote Link to comment Share on other sites More sharing options...
Cordell Posted September 15, 2011 Report Share Posted September 15, 2011 Lol, never would have thought about the polarity. Did it really spin backwards? Quote Link to comment Share on other sites More sharing options...
Rocky31186 Posted September 15, 2011 Report Share Posted September 15, 2011 thats interesting. Lol Quote Link to comment Share on other sites More sharing options...
Archie Posted September 15, 2011 Author Report Share Posted September 15, 2011 Lol, never would have thought about the polarity. Did it really spin backwards? The POS universal wiring didn't match up right, so it was was blowing instead of sucking and pumping. I only figured because I heard a weird as noise and no fuel was going into the lines. Thank got I was an Electrical Engineering student at one time lol Quote Link to comment Share on other sites More sharing options...
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