Fuel Pump Not gettin power - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 15 Old 07-28-2006, 07:25 PM Thread Starter
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Fuel Pump Not gettin power

its been an all day thing.... my new motors ready to fire but can't get my new holley 255 to kick on... i just put in a new battery relocation kit and resently removed all my wiring to paint my engine bay... i got out a light tester and tested and the pump is for sure not getting power... took out the fuse looks good... put the light tester in the fuse hole and the fuse is getting power.... so im at my wiring knowledge limit...all of the other things work, lights, stereo, starter, horn!! i got a dyno tune appointment set for monday... so i need u guys fast...

thanks colby


94 GT....forged 306, Trickflow Street Intake,
Stage 3 Ported GT-40P's, Lunati 51014 cam w/ 1.7's
S-Trim.. heat soaked.. 509rwhp & 505tq
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post #2 of 15 Old 07-28-2006, 07:36 PM
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there is a ground in the engine bay that most people over look but it is not hooked up then the fuel pump will not work. It is located over by the coil. I am not for sure but i think that the small ground wire that runs from the battery goes to that ground.


Big Bore Boss 347 FTI 225cc High Port, FTI Cam, Box R Intake under stock hood, T-56 Magnum, 4.30 gears.
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post #3 of 15 Old 07-28-2006, 07:51 PM Thread Starter
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GREAT POST!!!

when i did my batter relocation kit i noticed that the battery negative had a wire coming from it and then had a washer ground... but then another wire went to the same washer and grounded... i cut off the ground going to the washer and re grounded it... did i mess up??

94 GT....forged 306, Trickflow Street Intake,
Stage 3 Ported GT-40P's, Lunati 51014 cam w/ 1.7's
S-Trim.. heat soaked.. 509rwhp & 505tq
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post #4 of 15 Old 07-28-2006, 09:33 PM
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The wire coming from the battery to the washer ground you should not need. But the other wire coming from the washer gound is the ground that runs the fuel pump and need to be grounded. make sure you are on a good clean surface with now paint to be sure you are getting a good ground.

Big Bore Boss 347 FTI 225cc High Port, FTI Cam, Box R Intake under stock hood, T-56 Magnum, 4.30 gears.
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post #5 of 15 Old 07-28-2006, 09:57 PM Thread Starter
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thanks man... ill check it again but i made sure i had a good ground on it... could it be anything else i looked over??

94 GT....forged 306, Trickflow Street Intake,
Stage 3 Ported GT-40P's, Lunati 51014 cam w/ 1.7's
S-Trim.. heat soaked.. 509rwhp & 505tq
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post #6 of 15 Old 07-28-2006, 10:30 PM Thread Starter
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i looked and have a good ground on it... any other ideas??

i need to figure this out asap

94 GT....forged 306, Trickflow Street Intake,
Stage 3 Ported GT-40P's, Lunati 51014 cam w/ 1.7's
S-Trim.. heat soaked.. 509rwhp & 505tq
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post #7 of 15 Old 07-28-2006, 10:40 PM
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check your fuel relay switch and fusible links are you sure you pluged the pump harness up when you installed the tank and did you wire the pump up correctly aslo check the fuel pump cutoff switch to see if it has been tripped
post #8 of 15 Old 07-28-2006, 10:59 PM Thread Starter
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i checked the relay fuse and the relay switch... dropped the tank again to make sure i hooked up the harness and did... the wiring that goes to the fuel pump does not have power (checked with testing light)... the only thing i can get a power light is when i remove the fuse and test on that... then it lights up... i can not think of what it can be... it has to be after the fuse box
explain about the fusable links its the only think i did not check!

94 GT....forged 306, Trickflow Street Intake,
Stage 3 Ported GT-40P's, Lunati 51014 cam w/ 1.7's
S-Trim.. heat soaked.. 509rwhp & 505tq
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post #9 of 15 Old 07-28-2006, 11:25 PM
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the links are in the wiring harness on the drivers side strut tower i had a blown llink that killed power to my fuel pump cant remember which one it was though just check all the links on both side of the links with a test light....... i am not for sure but i think the link i had to fix was either green or black and orange good luck
post #10 of 15 Old 07-29-2006, 05:00 AM
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Quote:
Originally Posted by Blackfive0
there is a ground in the engine bay that most people over look but it is not hooked up then the fuel pump will not work. It is located over by the coil. I am not for sure but i think that the small ground wire that runs from the battery goes to that ground.
It sounds like you're describing the dedicated ground for the EEC itself.
In stock form, a few inches from the fender, it has a little capsule (like a glass fuse holder). That doesn't matter but helps with identifying it.

Good luck.

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post #11 of 15 Old 07-29-2006, 09:33 AM Thread Starter
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ill try my best to check the fusable links... could it be the fuel pump relay?

94 GT....forged 306, Trickflow Street Intake,
Stage 3 Ported GT-40P's, Lunati 51014 cam w/ 1.7's
S-Trim.. heat soaked.. 509rwhp & 505tq
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post #12 of 15 Old 07-29-2006, 09:34 AM Thread Starter
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its just werid that the old pump worked before i removed the harness and then didnt work when i put it back... could i be forgetting to plug in something??? but everything else works on the fuse box?

94 GT....forged 306, Trickflow Street Intake,
Stage 3 Ported GT-40P's, Lunati 51014 cam w/ 1.7's
S-Trim.. heat soaked.. 509rwhp & 505tq
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post #13 of 15 Old 07-29-2006, 11:58 AM Thread Starter
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fixed the problem... i didnt knwo that i had to have the coolent res. harness hooked up... hooked it up and the fuel pump took off...

thanks guys

94 GT....forged 306, Trickflow Street Intake,
Stage 3 Ported GT-40P's, Lunati 51014 cam w/ 1.7's
S-Trim.. heat soaked.. 509rwhp & 505tq
BADAZGT
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post #14 of 15 Old 09-05-2006, 11:25 AM
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Am having similar problems with my fuel pump, did a search, and found this thread. Is it really necessary to have the coolant reservior harness connected for the fuel pump to work? I just wouldn't think the two would be related. What about all those that have upgraded to a better radiator/electric fan combo and no longer have the stock coolant reservior setup?
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post #15 of 15 Old 09-05-2006, 03:37 PM
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Quote:
Originally Posted by BrianSteuerwald
Am having similar problems with my fuel pump, did a search, and found this thread. Is it really necessary to have the coolant reservior harness connected for the fuel pump to work? I just wouldn't think the two would be related. What about all those that have upgraded to a better radiator/electric fan combo and no longer have the stock coolant reservior setup?
I had the same problem last week after hiding my wires. I too found this post and thought it was odd that the res sensor had to be hooked up since my car never had one before hand. Mine turned out to be the EEC power wire got stuck to a ground instead of the solenoid after I hooked everything back up

Double check all your grounds over by the solenoid and also the fuseable links in that area.
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