fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
Thread Starter
Junior Member
Joined: Mar 2008
Posts: 27
Likes: 0
From: columbus, ga
Car: 1991 Camaro RS
Engine: :( 3.1
Transmission: 700r4
fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
ok, short story of whats wrong, but please read the whole thing, the end is the question....
the problem was... would turn over but no start.. not even igniting the fuel
first, the distributor hold down bolt was too lose and spon (sP) the distributor.. not knowing this it was back firing and running bad so i replaced a the coil and other iteams.. even timing chain,... but then we realized what it was and set the time.. ran good for a day.. then wouldnt crank.. had no idea and i've replaced pretty much every sensor on the car ( ecm, new distributor, wires, plugs, cap, rotor, iac, map, etc. everything.. then one day i tested my fairly new coil and realized it was bad.. so after being upset over not knowing what was wrong and so lost its not even funny.. i realized maybe its my plugs (even tho there new) so i tested them.. BAD so i was happy cause at this point i had no idea what it could be... ok.. this was 2 days ago.. and when i was turning it over testing the plugs i smelt plenty of fuel.. so i know the fuel pump was working... today i changed the plugs and then hooked up the fuel pressure tester... NO PRESSURE.. so.. heres the question
no fuel pressure, but i did the jump on the diognostic port.. no codes.. so i check the relay.. checked the wire diagram in my haynes manual.. the relay gets power, and the oil pressure/ fuel pump switch or w/e on the side of the block has power coming out of the grey wire-- which goes to a inline fuse and to the fuel pump...
i tested power to the grey wire from the sensor.. gets power, but does not get power at the fuel pump...
what is going on??? where is this (inline fuse) i dont have a fuse under the dash..
questions again.. simple
where is this fuse?
why else could my fuel pump not get power after the oil pressure sender?
how can i fix this?
the problem was... would turn over but no start.. not even igniting the fuel
first, the distributor hold down bolt was too lose and spon (sP) the distributor.. not knowing this it was back firing and running bad so i replaced a the coil and other iteams.. even timing chain,... but then we realized what it was and set the time.. ran good for a day.. then wouldnt crank.. had no idea and i've replaced pretty much every sensor on the car ( ecm, new distributor, wires, plugs, cap, rotor, iac, map, etc. everything.. then one day i tested my fairly new coil and realized it was bad.. so after being upset over not knowing what was wrong and so lost its not even funny.. i realized maybe its my plugs (even tho there new) so i tested them.. BAD so i was happy cause at this point i had no idea what it could be... ok.. this was 2 days ago.. and when i was turning it over testing the plugs i smelt plenty of fuel.. so i know the fuel pump was working... today i changed the plugs and then hooked up the fuel pressure tester... NO PRESSURE.. so.. heres the question
no fuel pressure, but i did the jump on the diognostic port.. no codes.. so i check the relay.. checked the wire diagram in my haynes manual.. the relay gets power, and the oil pressure/ fuel pump switch or w/e on the side of the block has power coming out of the grey wire-- which goes to a inline fuse and to the fuel pump...
i tested power to the grey wire from the sensor.. gets power, but does not get power at the fuel pump...
what is going on??? where is this (inline fuse) i dont have a fuse under the dash..
questions again.. simple
where is this fuse?
why else could my fuel pump not get power after the oil pressure sender?
how can i fix this?
Supreme Member
iTrader: (1)
Joined: Mar 2005
Posts: 1,089
Likes: 0
From: Western PA
Car: 91 Camaro
Engine: 3.1/3100 in progress...Turbo Soon
Transmission: 700r4
Re: fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
There are 2/3 relays above/next to the brake booster.

^^^Right where I circled. I believe 1 is the fuel pump relay. Not sure which one...maybe someone can chime in and let you know which.

^^^Right where I circled. I believe 1 is the fuel pump relay. Not sure which one...maybe someone can chime in and let you know which.
Junior Member
Joined: Jun 2008
Posts: 20
Likes: 0
From: Corpus Christi
Car: 1992 Camaro RS
Engine: 3.1 V6
Transmission: Auto
Axle/Gears: Stock
Re: fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
The in line fuse for the fuel pump is on the passenger side fender right above the stock air box. It is tucked up in a rubber or plastic boot if I remember correctly. pull out the boot, and should have a regular 20 amp fuse.
Senior Member
Joined: Jan 2008
Posts: 917
Likes: 1
From: peterborough UK
Car: 88 T firebird
Engine: 2.8
Transmission: t5
Junior Member
Joined: Dec 2008
Posts: 10
Likes: 0
From: Navarre, Fl
Car: 1988 Camaro RS
Engine: 3.1 l V-6 (from a '90)
Re: fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
Do't know if you fixed your problem or noy but I had a very similar issue. I even had voltage going to the switch that was suposed to actuate it - but I found out that there wasn't enough amperage. I changed the ECM and she started right up.
Junior Member



Joined: Jan 2025
Posts: 58
Likes: 9
From: Virginia
Car: 1989 Camaro Iroc-Z Z28
Engine: L98
Transmission: 700r4
Axle/Gears: 2.77 G80
Re: fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
ok, short story of whats wrong, but please read the whole thing, the end is the question....
the problem was... would turn over but no start.. not even igniting the fuel
first, the distributor hold down bolt was too lose and spon (sP) the distributor.. not knowing this it was back firing and running bad so i replaced a the coil and other iteams.. even timing chain,... but then we realized what it was and set the time.. ran good for a day.. then wouldnt crank.. had no idea and i've replaced pretty much every sensor on the car ( ecm, new distributor, wires, plugs, cap, rotor, iac, map, etc. everything.. then one day i tested my fairly new coil and realized it was bad.. so after being upset over not knowing what was wrong and so lost its not even funny.. i realized maybe its my plugs (even tho there new) so i tested them.. BAD so i was happy cause at this point i had no idea what it could be... ok.. this was 2 days ago.. and when i was turning it over testing the plugs i smelt plenty of fuel.. so i know the fuel pump was working... today i changed the plugs and then hooked up the fuel pressure tester... NO PRESSURE.. so.. heres the question
no fuel pressure, but i did the jump on the diognostic port.. no codes.. so i check the relay.. checked the wire diagram in my haynes manual.. the relay gets power, and the oil pressure/ fuel pump switch or w/e on the side of the block has power coming out of the grey wire-- which goes to a inline fuse and to the fuel pump...
i tested power to the grey wire from the sensor.. gets power, but does not get power at the fuel pump...
what is going on??? where is this (inline fuse) i dont have a fuse under the dash..
questions again.. simple
where is this fuse?
why else could my fuel pump not get power after the oil pressure sender?
how can i fix this?
the problem was... would turn over but no start.. not even igniting the fuel
first, the distributor hold down bolt was too lose and spon (sP) the distributor.. not knowing this it was back firing and running bad so i replaced a the coil and other iteams.. even timing chain,... but then we realized what it was and set the time.. ran good for a day.. then wouldnt crank.. had no idea and i've replaced pretty much every sensor on the car ( ecm, new distributor, wires, plugs, cap, rotor, iac, map, etc. everything.. then one day i tested my fairly new coil and realized it was bad.. so after being upset over not knowing what was wrong and so lost its not even funny.. i realized maybe its my plugs (even tho there new) so i tested them.. BAD so i was happy cause at this point i had no idea what it could be... ok.. this was 2 days ago.. and when i was turning it over testing the plugs i smelt plenty of fuel.. so i know the fuel pump was working... today i changed the plugs and then hooked up the fuel pressure tester... NO PRESSURE.. so.. heres the question
no fuel pressure, but i did the jump on the diognostic port.. no codes.. so i check the relay.. checked the wire diagram in my haynes manual.. the relay gets power, and the oil pressure/ fuel pump switch or w/e on the side of the block has power coming out of the grey wire-- which goes to a inline fuse and to the fuel pump...
i tested power to the grey wire from the sensor.. gets power, but does not get power at the fuel pump...
what is going on??? where is this (inline fuse) i dont have a fuse under the dash..
questions again.. simple
where is this fuse?
why else could my fuel pump not get power after the oil pressure sender?
how can i fix this?
C4. May be in front of the battery and not behind, (that's where it is on the 5.0 and 5.7)
Last edited by RottenThomas; Jan 30, 2025 at 07:21 PM.
Joined: Dec 2004
Posts: 16,694
Likes: 979
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
Thanks mr obvious
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Junior Member



Joined: Jan 2025
Posts: 58
Likes: 9
From: Virginia
Car: 1989 Camaro Iroc-Z Z28
Engine: L98
Transmission: 700r4
Axle/Gears: 2.77 G80
Re: fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
Re: fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
Hey, Derp dude, do you realize your trying to "help" someone whose problem was in 2008!!!!!
And who hasn't been seen here since 2009, SIXTEEN YEARS AGO!!!!!!!
In BARELY OVER A YEAR THIS THREAD WILL BE OLD ENOUGH TO JOIN THE ARMY


Seriously Derp dude, in the future, PLEASE check the dates of the threads your bumping...... Seriously.....
And who hasn't been seen here since 2009, SIXTEEN YEARS AGO!!!!!!!
In BARELY OVER A YEAR THIS THREAD WILL BE OLD ENOUGH TO JOIN THE ARMY



Seriously Derp dude, in the future, PLEASE check the dates of the threads your bumping...... Seriously.....
Supreme Member

Joined: Aug 2021
Posts: 1,143
Likes: 336
From: CT
Car: 82 TA
Engine: Zz430 clone w a torquestorm blower
Transmission: Magnum f
Axle/Gears: Ford 9 w 4.11
Re: fuel pump- NO POWER. HELP HELP HELP HELP HELP HELP HELP
Dude, who knows the OP may still be trying to find the fuse and relay. That schematic may have helped the OP moved on to the next phase of diagnostics. Or even better they're out doing celebratory doughnuts in the car as a result and will soon post about best new tire choices!
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