Fuel pump relay?

Tiny
SHARPFISHERMAN
  • MEMBER
  • 2001 MITSUBISHI GALANT
  • 3.0L
  • V6
  • FWD
  • AUTOMATIC
  • 225,000 MILES
I got a 2001 Mitsubishi galant that I can't get to start. I got in the car to start it and it started for about 2 sec and then died and won't start back. The fuel pump is not kicking on so I took it out and hook it up directly and it worked so I changed filter and put back in and again it would not work. So I changed the fuel pump relay and still wouldn't work. So I took the old pump back out and hooked up a new fuel pump, and again it did not work. I checked to see if there was power to the relay and I got nothing with the key off and the key on. So my question is, what would cause there to be no power to both the fuel pump and the relay. And it does have the anti theft system equipped.
Monday, February 23rd, 2015 AT 12:10 AM

34 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Hello,

There is a fuse #13 that needs to be checked which powers the relay here is a guide to help us get started and the fuel pump and engine wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (Below). Please let us know what happens.

Cheers

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Monday, February 23rd, 2015 AT 2:10 AM
Tiny
SHARPFISHERMAN
  • MEMBER
  • 3 POSTS
Ok test light comes on at fuel pump and fuel pump relay with key on. But still fuel pump is not kicking on.
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Friday, February 27th, 2015 AT 9:47 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Power at the fuel pump? Are you sure about that?

It's only supposed to power for the first 2 seconds when the key is first turned on.
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Friday, February 27th, 2015 AT 1:26 PM
Tiny
SHARPFISHERMAN
  • MEMBER
  • 3 POSTS
No am not really for sure cause I didn't know where to really touch the test light at thE fuel pum. So I touch it in the wire harness and the fuel pump and the test light come on in like 2 or 4 wires back there with the key on. But not for sure if that was right
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Friday, February 27th, 2015 AT 5:39 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
If you're having trouble working a test light, then we don't have much chance of solving this.

It looks like both the power wire and the ground wire are black.

https://www.2carpros.com/images/external/87613534.gif
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Friday, February 27th, 2015 AT 6:09 PM
Tiny
JOSHUA CRAMER
  • MEMBER
  • 2 POSTS
  • 2000 MITSUBISHI GALANT
  • 2.5L
  • 4 CYL
  • 150,000 MILES
I am having a fuel issue. We replaced the fuel pump after not getting any fuel to the engine and it did not solve the issue. We noticed that the fuel pump relay was not clicking and tried a different relay with no solution. I have tested for power at the pump and got noting, after finding that an incorrect fuse was in the PCM slot, we were able to hear the fuel pump engage one time. But the car would not start. Took the fuel line loose from the injector rail and noticed a little fuel but was not sure if it was from the last time it ran. There is no blockage between the pump and the rail. Car has spark and runs on ether and I highly doubt all injectors are bad. I am pretty good with a DMM but I just do not have the time at the moment to spend so long on an electrical issue but at this point I am leading my search to the PCM/ECM. Help me. I am going in circles trying to get this started. I already messed up a connector for a fuel injector getting the rail off so I am just baffled at such an issue. Any advice or testing I will do.
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Friday, September 11th, 2020 AT 1:11 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,271 POSTS
Hello,

It sounds like the A/T relay might not be working right. Here is the fuel engine wiring diagram so you can see how the system works. The PCM turns the relay on so it must see the engine cranking over or it wont turn the relay on. When you turn the key to the on position without cranking it do you hear the pump prime?

Here is a guide to help you test the wiring:

https://www.2carpros.com/articles/how-to-check-wiring

Here are the engine wiring diagrams.

Check out the diagrams (below).

Please let us know what happens.

Cheers, Ken
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Friday, September 11th, 2020 AT 1:11 PM (Merged)
Tiny
JOSHUA CRAMER
  • MEMBER
  • 2 POSTS
I have only heard the pump prime once. But after I disconnected the fuel line from the rail it did not try to re-prime. I am not at the car for a while so this post might go cold for a few days but I am still open to all suggestions. I will try them all until this works.
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Friday, September 11th, 2020 AT 1:11 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,271 POSTS
Let me know after you check the relay, you can try swapping it as well.
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Friday, September 11th, 2020 AT 1:11 PM (Merged)
Tiny
NGA_WILDONE
  • MEMBER
  • 1 POST
  • 2000 MITSUBISHI GALANT
Location of fuel pump relay please
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Friday, September 11th, 2020 AT 1:11 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.


https://www.2carpros.com/forum/automotive_pictures/12900_fp_relay_11.jpg

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Friday, September 11th, 2020 AT 1:11 PM (Merged)
Tiny
LAMSHA
  • MEMBER
  • 8 POSTS
  • 2000 MITSUBISHI GALANT
I have a 2000 Mitsubishi galant 6cyl im trying to replace a fuel pump relay and im trying to identify which it is because I see more than one of those

We know where the fuse box is for the fuel pump relay just trying to find which one is it because the plugins look alike
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Friday, September 11th, 2020 AT 1:12 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
While cranking see if you have power to both sides of the fuel pump fuse if you do the relay is working.
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Friday, September 11th, 2020 AT 1:12 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Refer to diagram.
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Friday, September 11th, 2020 AT 1:12 PM (Merged)
Tiny
LAMSHA
  • MEMBER
  • 8 POSTS
Thanks alot for diagram and the connectors to the fuel pump one of its prong has a burnt mark on it what could that possibly be
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Friday, September 11th, 2020 AT 1:12 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
One of the terminals to the fuel pump module is burnt?If so probably a bad fuel pump. Do you have power and ground to the fuel pump while cranking the engine?
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Friday, September 11th, 2020 AT 1:12 PM (Merged)
Tiny
LAMSHA
  • MEMBER
  • 8 POSTS
Yes it does have power
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Friday, September 11th, 2020 AT 1:12 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If there is power and ground to the fuel pump and its not working bad fuel pump.
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Friday, September 11th, 2020 AT 1:12 PM (Merged)
Tiny
ICEDRAGON727
  • MEMBER
  • 1 POST
  • 1994 MITSUBISHI GALANT
Electrical problem
1994 Mitsubishi Galant 4 cyl Two Wheel Drive Automatic

where would I find the fuel pump realy on a 94 Galant
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Friday, September 11th, 2020 AT 1:12 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi icedragon727,

Should be under the radio behind the centre console.
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Friday, September 11th, 2020 AT 1:12 PM (Merged)

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