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Fuel pump relay

Tiny
MATTHEW.BOWLING
  • MEMBER
  • 1999 DODGE DAKOTA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 75,000 MILES
My fuel pump doesn't shut off. It keep that same hum when you first turn the key to the on position. Also it wont idle until it gets worm. I have talked to a few people about it and they seem to thank it has something to do with the (ASD) relay. I just replaced my fuel pump and it was running fine no problems until now and I don't know what to do for it. If you can help I would be most grateful.
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Monday, November 3rd, 2008 AT 4:05 PM

40 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi:
Are you saying the new fuel pum is not working?
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Monday, November 3rd, 2008 AT 8:29 PM
Tiny
MATTHEW.BOWLING
  • MEMBER
  • 2 POSTS
No it is working it just doesn't shut off after the vehicle is started. You know how when you turn your key to the on position you can hear the fuel pump kick on for about 2 seconds then it will shut off. Well mine doesn't it stays on even when it is started. You can hear that little high pitch hum wile the truck is running. The A.S.D. Relay is the auto shutdown relay for the fuel pump witch is what I believe it may be but I don't have any idea on how to fix the problem, people have told me that there is a way to reset them but no info on how you reset it.
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Tuesday, November 4th, 2008 AT 5:27 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi Again:
Yes it could be a bad ASD. I checked all of my resources and can't find anything regarding a reset. However, when you find it, look it over.

The ASD is located inder the hood in the power distribution box (PDC). Refer to the PDC cover for relay location. Also, if you can find an exact match relay in another location, switch them to see if it takes care of the problem.

If this doesn't work, I want you to check one more thing. A common problem with these trucks is how Chrysler splices together in the wiring harness. Under the underhood fusebox, unwrap the tape on the harness about 6 to 10 inches until you find a splice of 3 wires--redo it if green or doesn't look good.

Let me know if this helps, or if you have any other questions.
Joe
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Tuesday, November 4th, 2008 AT 9:12 PM
Tiny
GSXR750
  • MEMBER
  • 1 POST
  • 1998 DODGE DAKOTA
  • V8
  • 4WD
  • AUTOMATIC
  • 116,000 MILES
I replaced my fuel pump on my 1998 dodge dakota 5.2 litre 4x4 club cab. Realizing later that it was electrical, gettin no power to the pump. I probed around a little and found nothing. Fuse and relay are good. Im thinking it might be ignition switch or somethin, but dont really know where to start. Please help!
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pump relay coil side computer controlled circuit-could be open or the computer itself is defective
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
There will not be voltage to the pump, ignition coil, injectors, or alternator field unless the engine is rotating, (cranking or running). The automatic shutdown (ASD) relay turns on to send voltage to those things when the Engine Computer gets pulses from the crankshaft and camshaft position sensors.

Hi Rasmataz.

Caradiodoc
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello Doc you have a great holiday's-Also check fuse no.9 in the junction block and also fuse no.3 30amp in the PDC-Good Luck
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
BOILERBOB
  • MEMBER
  • 1 POST
  • 1998 DODGE DAKOTA
  • V8
  • 4WD
  • AUTOMATIC
  • 76,000 MILES
I have a 98 5.2 with no voltage to fuel pump relay. PCM(Module) not sending voltage to relay in PDC(relay panel). Could it be wiring connection problem in PDC or fault to PCM preventing power up of fuel pump. Jumped fuel pump at PDC and fuel pump operates. ASD(shutdown relay) not pulling in with key start. Should it be energized?

ANY SUGGESTIONS?

THANKS!

**NOTE: Approximately two weeks before failure, Check engine light code for Park/Neutral switch came on. The truck ran for a couple weeks with no problem while the CEL was on. The CEL shut off on its own. Truck does crank.
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
If it cranks, it's not the neutral safety switch. Based on your description, my first guess is the PCM itself. I would recommend having it checked.

Let me know what you find.

Joe
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
JDAMON
  • MEMBER
  • 1 POST
  • 1997 DODGE DAKOTA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 201,000 MILES
Have a 97 Dakota that just died driving down the road. This is a two wheel drive, 3.9v 6. I determined that it is not gettingh fuel. Dropped the tank to check the fuel pump and concluded it is not getting power/ ( I believe this should be coming thru the Green wire) I switched the ASD relay with the hour relay ( Same relay) and it did not seem to make a difference. Is there any sensors or other relays that would cause this
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you check for codes? With the engine cranking, is there spark at the plugs. The asd relay supplies voltage to the coil and injector/s, if there is a problem with the relay or control circuits, there won't be any spark at the plugs or injector pulse, with the engine cranking. You can unplug the asd and fuel pump relay, turn on the key, you don't have to crank it, check for two voltage sources at the connectors for each one. If the voltage is ok, then the computer may not be grounding the coil side of the relays. I believe the computer has to see the proper cam and crank signals or it won't ground those relays. I'm not saying replace those sensors, but, you need to do some testing.

I just wanted to add, according to my information, the asd relay doesn't control the fuel pump.
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
SIRDON113
  • MEMBER
  • 1 POST
  • 1996 DODGE DAKOTA
  • 2.5L
  • 4 CYL
  • 2WD
  • MANUAL
  • 135,000 MILES
I had pulled the bed off for the fuel pump thinking bad fuel pump found not getting Volts on green wire.
Finding no power bad relay replace relay still no power at the green wire. After touching many things tracing wires started getting power and worked fine. The next day I went to put fuel pump back in not retested it and no power on green wire iam loosing ground on the relay. If I ground the the relay power is there.
Can I permanently ground it.? If not y? What else?
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check for a pooor connection at relay for one, maybe tweak the prong to see if it works ok. It may be a bad module as well but check the ground on rear frame rail see if it's rusted/corroded etc to see if that is the problem. Also check your asd relay as that may be the problem and ground for pcm on top of generator. Finally have a pro scan it for a bad pcm.
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
MALLBRAT
  • MEMBER
  • 1 POST
  • 1995 DODGE DAKOTA
  • V8
  • 4WD
  • AUTOMATIC
  • 70,000 MILES
I Replaced My Fuel Pump Assembly, Relay In 1995 Dodge Dakota, Still Not Firing, No Fuel Pressure, Not Starting.
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Inspect and test the autoshutdown relay-ASD relay is powers the coil/injectors/fuel pump-thru the fuel pump relay
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-2
Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
LOCOTA94
  • MEMBER
  • 4 POSTS
  • 1994 DODGE DAKOTA
  • 6 CYL
  • 2WD
  • MANUAL
  • 78,000 MILES
I installed an aftermarket fuel pump and fuel cell on my dodge dakota. I spiced the fuel pump power wire into the stock fuel pump power connector. I can start the truck fine but after about 10 minutes at idle the fuel pump starts making a whining noise and the truck just dies. I put a fuel pressure tester on the fuel bar and its reading over 100 psi and my truck only requires 45 psi. I bought a fuel pressure regulator and installed it inline after the fuel pump and it is not regulating at all. Also with the fuel pressure tester installed the pressure holds steady over 100 psi then about 10 minutes at idle the pressure starts to bleed off and the fuel pump starts to surge. I tested the volts on the fuel pump and it starts at about 11.3v then as the fuel pump squeals and the pressure drops the volts jumped to about 13v. I am lost and this problem is killing. I am looking for any input at this time.
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the return line if its clogged-up
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
LOCOTA94
  • MEMBER
  • 4 POSTS
I blew out my return line and made sure it wasnt clogged
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
What kind of fuel system do you have? TBI/MPFI/SFI/CFI?
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Monday, August 26th, 2019 AT 6:21 PM (Merged)
Tiny
PETEY BOY
  • MEMBER
  • 3 POSTS
  • 1992 DODGE DAKOTA
  • V8
  • 4WD
  • AUTOMATIC
  • 78,000 MILES
I was not getting any fuel to the injectors so I assumed the fuel pump was bad. But after taking the tank down and checking the pump out of the tank, it was OK. I am not getting any power at the connecter back at the tank. The circuit for the gauge does work, but no power on the circuit for the pump motor. There doesn't seem to be any power at the fuel pump relay either.I;m baffled.
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Monday, August 26th, 2019 AT 6:21 PM (Merged)

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