LT1-LT4 Modifications 1993-97 Gen II Small Block V8

fuel pump have a fuse relay but where?

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Old 07-19-2010, 07:17 PM
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Originally Posted by BTC
So, you can put voltage on the prime connector to determine whether the pump is dead? That was a great idea. Did they think of it before the '95 models? My fuel pump appears to be dead, but it would be nice to confirm that before dropping the tank.
All it does is run the pump. Jumping 12v to it is the same as turning the key on. It doesn't tell you if the pump is dead or not.
Old 07-19-2010, 07:47 PM
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Originally Posted by RamAir95TA
All it does is run the pump. Jumping 12v to it is the same as turning the key on. It doesn't tell you if the pump is dead or not.
Thanks. Your answer makes my question seem kinda stupid, I think. Does the prime connector bypass the relay? If so, I guess it might at least confirm whether the relay is good. I'm pretty sure my relay is good because I can feel it switching on and off with the key.
Old 07-19-2010, 08:23 PM
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Originally Posted by alexcoreas
Well I disconnected the line that goes to the fuel pressure regulator. I'm using and air gauge ,I'm running out of ideas so I used w.e I had, what's the right way bro, I need help and I really appreciate all ur help and replies thanks
If the line you disconnected just plugs on and off the top of the FPR, you are checking the vacuum hose. It won't have any pressure, but will show vacuum when the engine is running.
The fuel lines are the two hard lines that RamAir95TA is discussing, which require fuel line disconnect tools to unhook.
There is a nipple which contains a schrader valve, located next to the FPR. That is where you connect the fuel pressure gauge to verify the fuel pressure.
Best of luck.
Old 07-19-2010, 08:36 PM
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Well I don't hear the buzzing noise anymore, man This **** is difficult. Ill Start again tomorrow. Keep u updated
Old 07-19-2010, 08:59 PM
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My fuel pump is also not priming, which is why I suspect it's shot. That pump probably doesn't have 2-3 hours of actual run time on it. My car has been on jack stands for a few years, and I don't know whether we didn't start it often enough, or whether I just got a bad fuel pump. I suspect the latter, as it came from Autozone or Advance. I wish I had opted for the Delphi pump that O'Reilly's offered, but I had already paid for the other one.
Old 07-19-2010, 09:00 PM
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replacing the fuel pump really is not that hard at all. first though, you should really check all the other possibilities before saying your pump is bad. mine ended up being a bad alternator because it wasn't getting the power to the pump. I found that out after I replaced everything else.

btw..I did the "trap door" method for the pump.
Old 07-19-2010, 09:06 PM
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The alternator doesn't play a role when the pump first primes("buzzes"), does it?
Old 07-19-2010, 09:09 PM
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Yea it requires.a tool that is 3/8th without it u can't pull it out. Ill take a pic in 5 min
Old 07-19-2010, 10:02 PM
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These are the ones I pulled well only 1 of them the one closest to me
Old 07-19-2010, 11:12 PM
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You don't disconnect lines to check fuel pressure. You use the schrader valve to hook up a test gauge. This info was given way back in post #17 by RamAir95TA.

http://shbox.com/1/fp_reg.jpg
Old 07-19-2010, 11:30 PM
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I know I was just showing him what I did prior to him telling me that. That's all
Old 07-20-2010, 03:38 PM
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There is no power going to my pump we checked the connection by the rear end and no power wtf, I looked for the relay and can't seem to find it. Frustrated bros
Old 07-20-2010, 03:50 PM
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The relay could be bad, and should be in the vicinity shown in shbox's pics.
Old 07-20-2010, 04:03 PM
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Okay ill go back to looking right now. I'm using shbox let me look again
Old 07-20-2010, 05:35 PM
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The fuel pump relay is located in the interior, below the driver side knee bolster and just behind the hood latch. It's gray in color.
Old 07-20-2010, 05:53 PM
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Okay found it. Also bought the fuel pressure checker lol. Absolutely zero pressure now. I hook 12v to the prime connector and pump still had zero pressure it didn't turn on. So I guess its my pump. Should I go with a oem? Bbk? Or what kind of pump bro?
Old 07-20-2010, 05:55 PM
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Originally Posted by alexcoreas
Okay found it. Also bought the fuel pressure checker lol. Absolutely zero pressure now. I hook 12v to the prime connector and pump still had zero pressure it didn't turn on. So I guess its my pump. Should I go with a oem? Bbk? Or what kind of pump bro?
www.racetronix.com

Pick up the pump and harness kit. It is a worthwhile upgrade that maintains constant voltage to the pump during high load. It comes with a Walbro 255lph pump - I run the same setup. Pricier than just a pump, but well worth it.
Old 07-20-2010, 06:02 PM
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Man we should be neighbors no homo. I could learn a lot from you. Ill order it now. Thanks bro hope it works. Do pumps go out, or am I just unlucky. I means its old same pump since 95 lol. Anything else u would recommend me changing?
Old 07-20-2010, 06:04 PM
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Originally Posted by alexcoreas
Man we should be neighbors no homo. I could learn a lot from you. Ill order it now. Thanks bro hope it works. Do pumps go out, or am I just unlucky. I means its old same pump since 95 lol. Anything else u would recommend me changing?
Just make sure you replace your fuel filter when you swap out the pump too. Mine is a 95 and the pump failed back in 2002 - that's when I did my Racetronix swap. It's slightly different now than it was 8 years ago, but it's pretty much the same kit.
Old 07-20-2010, 06:36 PM
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Will do so. Even though I changed it a month ago. I want a complete new system. I will do it tomorrow thanks bro keep u posted


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