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Fuel pump relay?

Tiny
BERNELL DUNCANJR
  • MEMBER
  • 2000 CHEVROLET CAMARO
The car will try to start but won't catch. I've replaced the fuel pump, it ran for about 3 weeks, and then it started one morning and by afternoon it won't start. I tried it three times before it started, got it home and tried to start it, won't start, got up next morning and it hasn't started since. Could it be the fuel pump relay? Or does it have a fuel filter I can change first. Before spending that kind of money on fuel pump relay?
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Friday, May 4th, 2007 AT 4:50 PM

28 Replies

Tiny
KIRBSTER269
  • MEMBER
  • 14 POSTS
Not sure what the problem is not really enough info but the filter is directly under driver sides door dont be directly under the filter that when you start this guide can help with how to test the fuel pump relay and the location on the relay in the diagrams below.

https://www.2carpros.com/articles/how-to-change-a-fuel-filter

and

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Fuel Pump Relay - In underhood electrical center No. 2. Check out the diagrams (Below). Please let us know what happens.
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Sunday, June 24th, 2007 AT 6:15 PM
Tiny
CPT87GN
  • MEMBER
  • 8 POSTS
Can you tell me where the fuel pump relay is located on a 1994 camaro I cant find it thankl you
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-1
Sunday, July 15th, 2007 AT 12:30 PM
Tiny
SEAN03
  • MEMBER
  • 523 POSTS
  • 1998 CHEVROLET CAMARO
  • 140,000 MILES
On our 1998 Chevy Camaro I am going to change the fuel filter today. I was looking on the z28 camaro forum and the guy said that you can pull the fuel pump relay then crank the engine for a few minutes and it will get rid of the gas in the line. Is this true if so is it safe. Thanks.
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Wednesday, October 21st, 2020 AT 6:14 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I looked at a 3.8L z28, yes sir, that will work. Or you can pull the fuel pump fuse and crank it.
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Wednesday, October 21st, 2020 AT 6:14 PM (Merged)
Tiny
SEAN03
  • MEMBER
  • 523 POSTS
I have the 5.7L I have a z28 sorry. Will it still be fine.
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Wednesday, October 21st, 2020 AT 6:14 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Yes, it will work.
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Wednesday, October 21st, 2020 AT 6:14 PM (Merged)
Tiny
JENNIFER SWIFT
  • MEMBER
  • 3 POSTS
  • 1998 CHEVROLET CAMARO
  • V8
  • 2WD
  • AUTOMATIC
  • 62,000 MILES
Have no power to Fuel Pump. Replaced fuel pump relay and fuses.
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-1
Wednesday, October 21st, 2020 AT 6:14 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The computer energizes the fuel pump relay for 2 secs and that's it to prime the fuel system-if you're looking for power at the fuel pump connector-you're not gonna have it after that 2secs-

When the engine fires up the oil pressure sending unit powers the fuel pump. see below


https://www.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_61.gif

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-1
Wednesday, October 21st, 2020 AT 6:14 PM (Merged)
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Does the check engine light come on when you turn the ignition to run? Do you have any power at the fuel pump relay with the key on?
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Wednesday, October 21st, 2020 AT 6:14 PM (Merged)
Tiny
JAY1212
  • MEMBER
  • 1 POST
I also am having similar problems and am I not getting a check eng light apon turning key, when I jump relay pump kicks on
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Wednesday, October 21st, 2020 AT 6:14 PM (Merged)
Tiny
GEL9000
  • MEMBER
  • 1 POST
  • 1994 CHEVROLET CAMARO
  • V8
  • 2WD
  • AUTOMATIC
  • 8,700 MILES
The location of fuel relay switch in a 1994 chevrolet Camaro two door T top L1 350 V8
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Wednesday, October 21st, 2020 AT 6:15 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS


https://www.2carpros.com/forum/automotive_pictures/12900_fr_4.jpg



https://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
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-1
Wednesday, October 21st, 2020 AT 6:15 PM (Merged)
Tiny
CPT87GN
  • MEMBER
  • 8 POSTS
  • 1994 CHEVROLET CAMARO
Im having trouble locating the fuel pump relay on my 1994 chevy camaro v8 and how do I check it ito see if its bad im not getting power to the fuel pump
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Wednesday, October 21st, 2020 AT 6:15 PM (Merged)
Tiny
4THGENZ28
  • MEMBER
  • 10 POSTS
First check the fuel pump fuse in fuse panel in drivers' side end of dash. The relay is located behind the dash near the fuse panel, and is wired to that fuse. Pull the relay and see if it is the same as used by the fog lamps If they are the same, exchange your fuel pump relay for the fog lamp relay located under the cover of the fuse block near the air filter's location, and with the ignition key turned on, temporarily turn on the fogs. If they operate as normal, your fuel pump relay is good. It is your fuel pump electrical connections, or the pump itself that will be suspect, if the fuse and relay are good. A clogged fuel filter could prevent the fuel pump from sending fuel even if there is a signal from the PCM, just as a loose or broken wire could cause a loss of power to the fuel pump. Check those items too. The fuel filter should be replaced every 2years or 24000 miles, to achieve maximum life from the pump and fuel injectors. Sooner, if needed.
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+4
Wednesday, October 21st, 2020 AT 6:15 PM (Merged)
Tiny
RAYMOND J
  • MEMBER
  • 1 POST
Fuel relay on 1994 Camaro Z28 is under the kick panel driver's side, square box on the floor by your left foot
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Wednesday, October 21st, 2020 AT 6:15 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,289 POSTS
Here is a diagram of its location (below) and a guide to test it.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Cheers, Ken
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Wednesday, October 21st, 2020 AT 6:15 PM (Merged)
Tiny
92_QUICK_SIX
  • MEMBER
  • 3 POSTS
  • 1992 CHEVROLET CAMARO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
I have a 3.1(v6) 92 Camaro runs great until a few weeks ago. No fuel is getting to the injectors. First replaced fuel filter [maybe being clogged]. Then a new fuel pump relay. [No good]. So replaced the fuel pump. [ That was no fun.] But horribly the car still wont start! I now found out that the relay isn't getting any power ! Did a small test [giving the relay power straight from the battery ] and the car started and ran =). So I think it just doesn't have power. All my fuses are good and brand new computer. So if anyone could tell me where the relay gets it's power from. I would really be greatful
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Wednesday, October 21st, 2020 AT 6:15 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
It gets its power from the fuel pump inline fuse 20amp orange wire.
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Wednesday, October 21st, 2020 AT 6:15 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
There is an in-line fuse coming off battery junction block
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Wednesday, October 21st, 2020 AT 6:15 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hello, there two sources of voltage for the fuel pump relay. Voltage for the load side of relay comes from an inline 20 amp fuse, maybe located under the hood, passenger side front, probably attached to the fender lining, you'll just have to look. The other source, for the coil side of relay comes from the pcm. This info also shows an oil pressure switch in the fuel pump circuit, once you crank it enough to bring up oil pressure, the switch closes and the pump gets voltage even without the relay. The o/p switch and load side of relay gets voltage from the same fuse already mentioned.
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Wednesday, October 21st, 2020 AT 6:15 PM (Merged)

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