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

Fuel pump not turning on

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Old Jun 26, 2009 | 05:23 PM
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Default Fuel pump not turning on

I changed the fuel filter and drained the lines of gas. Put in 2 gallons of fuel, car started and died. Then it wouldnt start at all.. nothing. Listened... fuel pump does not prime and my gas gauge needle is all the way past full (was not like that before all this) and does not move when i turn iginition on.. fuse was ok. Possibly the relay?

I hope it is not the pump itself... was replaced about 8000 miles ago. I just dont see why the needle would be stuck all the way up too..
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Old Jun 26, 2009 | 06:51 PM
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Try checking the Connector on the inside of the Rear Drivers wheel well..sounds like it's unplugged.
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Old Jun 26, 2009 | 07:03 PM
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Get a fuel pressue gauge on it just to be sure.
Jump the prime connector with 12v to see if you can get power to the pump.
Replace the relay if needed.
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Old Jun 26, 2009 | 07:25 PM
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Originally Posted by the_merv
Try checking the Connector on the inside of the Rear Drivers wheel well..sounds like it's unplugged.
Tried that, was fine and wires looked ok. Has zero pressure. Tried the 12v prime wire.. nothing. Changed out the relay... nothing. Used an multimeter on the relay wiring, there is power to the relay...

Last edited by 96blackz28; Jun 26, 2009 at 07:37 PM.
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Old Jun 26, 2009 | 07:29 PM
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Originally Posted by 96blackz28
Tried that, was fine and wires looked ok. Has zero pressure. Tried the 12v prime wire.. nothing. Changed out the relay... nothing. Used an multimeter on the relay wiring, and it is all dead. Nothing is going to the relay... sugestions?

What is the correct fuse to look for? I know its in the engine bay on a 96 but i cant find any that say anything about a fuel pump
Whenever you check for blown fuses, check each and every fuse while you are at it.
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Old Jun 26, 2009 | 07:37 PM
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correction.. there is power to the relay.. damn battery on the multimeter was dead. Guesing its the pump then?
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Old Jun 26, 2009 | 07:38 PM
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also check your fuel pump relay. not sure if they changed in the later years but on my 93 it is under the kick panel on the driver side. mine did the same thing....i had power but i had lost the ground.
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Old Jun 26, 2009 | 07:49 PM
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Pump could be very possibly be dead..sometimes it just happens like that.
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Old Jun 26, 2009 | 07:58 PM
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ok, well.. im going to do the trap door mod tommorrow.. been wanting to do that regardless. Good right up on this mod with pictures
Trap Door Mod HERE

Posted link just incase anyone was interested.
Geus im gonna make a trip to summit tommorrow to get a fuel pump. Its nice living close to summit racing.

Anyone have any suggestions for when i do the fuel pump.. any tips?
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Old Jun 26, 2009 | 08:17 PM
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Yea..don't half-*** it like that guy did with the Trap Door..actually cut it out where the connections are so you can reach them..

Here is mine..
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Old Jun 26, 2009 | 09:01 PM
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Originally Posted by the_merv
Yea..don't half-*** it like that guy did with the Trap Door..actually cut it out where the connections are so you can reach them..
Doing it that ^^^ way does make it a lot easier.
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Old Jun 26, 2009 | 09:38 PM
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do what merv said, I made that mistake
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Old Jun 26, 2009 | 11:01 PM
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Originally Posted by 96blackz28
.. any tips?
Instead of using a dremel with a cutting wheel just use a good pair of tin snips. It's much faster.
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Old Jun 27, 2009 | 10:43 AM
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Thanks for the tips, and many thanks for the photos "the_merv'". Ill let you know how it all goes
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Old Jun 27, 2009 | 11:02 AM
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No prob.

That trap door makes life alot easier..I did it when my Fuel Pump went out at a friends house. When I changed over to my Walbro it took about 20 min.
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Old Jun 28, 2009 | 04:10 PM
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got it all hooked up, was not too bad. Putt in a Walboro fuel pump and works like a charm now. I need to smooth the edges around the trapped door and make a cover for it. But it all went well, so im happy
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Old Jul 23, 2017 | 07:42 PM
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Default Car won't starta

Originally Posted by 96blackz28
got it all hooked up, was not too bad. Putt in a Walboro fuel pump and works like a charm now. I need to smooth the edges around the trapped door and make a cover for it. But it all went well, so im happy
Okay guys I'm have a similar problem with my car and would take any help that I can get. I have a 97 Z28 Camaro that just started giving me problems. I changed out the battery a bout a month ago and forgot to reconnect the negative battery terminal (didn't see it). The car started up and drive fine for the next 3 weeks. The fourth week the car act like it didn't wanna start, So I pop the hood to find that the negative terminal was disconnected the whole time. I reconnected it and it still don't start. I checked all the fuses under the hood and inside the driver fuse box nothing is blown. When I turn the car to the on position I don't hear the fuel pump (Racetronix fuel pump) humming and the fuel needle is showing a full tanks which it's not. I'm getting 12.08v when the key is turned on then drop to 7.59 at the power wire to the pump. I bought a fuel pressure gauge and its show 0 in the on position. I need to figure out if the pump is bad before I replace it. Any help will help I don't know what else it could be.
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