Fuel pump relay

Hi:
Are you saying the new fuel pum is not working?

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.

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

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!!!

Check the fuel pump relay coil side computer controlled circuit-could be open or the computer itself is defective

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

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

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.

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

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

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.

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 ??

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.

I Replaced My Fuel Pump Assembly, Relay In 1995 Dodge Dakota,Still Not Firing,No Fuel Pressure,Not Starting..

Inspect and test the autoshutdown relay-ASD relay is powers the coil/injectors/fuel pump-thru the fuel pump relay

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.

Check the return line if its clogged-up

i blew out my return line and made sure it wasnt clogged

What kind of fuel system do you have? TBI/MPFI/SFI/CFI???

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.

Check fuse no.16 in fuse block-if okay-look for power at coil and injector harness dark green and orange wire do you have it? If not test the ASD relay-relay okay test for power at t he PCM pin out no.3 red and white wire

MPFI

Thanks for your help with the no spark. I have repaired that problem(Bad ASD Relay) and now have spark and fuel. However, the motor now has a miss. The miss was intermettent before but it is constant now. I replaced all of the basics, wires,plugs,cap,rotor,filter.
I suspect it is a fuel injector or sticky valve. Does that sound logical? I will accept any guidance on this as it's driving me nuts....

Don't you have a fuel pressure regulator built within the fuel rail-Why do you have to install another regulator?

well i got rid of the stock fuel pump and i have looked at a couple of different diagrams all showing my fuel press reg mounted with the fuel pump assy., but yes i assumed there was a pressure regulator on my fuel rail, thats why i bought a after market, right now it is installed on my supply line right after my fuel pump and it is not slowing the fuel down at all. i also have a fuel filter installed but its before the pump, im gonna try putting it in front of the pump because thats how the stock one was

If you spliced in and not on a different circuit maybe two pumps are causing too much pressure. Renew original fuel system or run seperate 12 volt key on circuit. Make sure the old pump is not wired at all.
Maybe?

How did your intermittant too high pressure turn out, I still think about your problem. I don't like that Dakota setup but putting an outside unit makes sense but needs the right location, circuit and fuse and the old tank pump has coils for cooling and engineering purposes I guess. It didn't work very good though,lol. See ya locota94
Good year for Dakota's Joe

Electrical problem
1992 Dodge Dakota V8 Four Wheel Drive Automatic

checked fuses they are good still no power to autoshutdown relay and fuel relay when turning key to start truck

Hi, did you check the applicable fuses with a testlite? Even if the fuse is good, if no voltage on the circuit, the circxuit is dead. There is a fuse in the power distribution center, another in the regular fuse box, that has to do with ads and fuel pump relays. Fuse D in the power distribution center.

there is power fuses are good

I'd have to check voltage circuit at the fuel pump relay and asd relay. If no voltage when there should be, I'd have to track the circuit.

stopped running while driving. I replaced the crankshaft sensor, coil and ignition module/camshaft sensor. Switched relays and it did not help and checked the 3 to 1 red wires in the harness, they are good. Not getting power to fuel pump and coil. what am I missing to do?

Check all your fuses especially fuse for the ECM.

all fuses and relays good.

my vehicle runs over.

You said there is no power to coil? That same wire feeds 12 volts to the fuel injectors. If no power when you turn the ignition switch on does the check engine light illuminate on? If it does not recheck your ASD relay. You will also need to check for power and ground at the ECM. If the check engine light comes on, cycle the ignition on, off, on, off, on the check engine light will start to flash codes. So if it flashes one time then pauses and flashes two times that would be a code 12. Try to retrieve codes and let us know what you find.

No check engine light. All the relays are the same and I have inter-changed all the relays and nothing.

Engine Mechanical problem
1988 Dodge Dakota 6 cyl Two Wheel Drive Automatic

i replaced the fuel pump and the fuel relay switch, at first it primed up and started but lost fuel pressure.... i need to know if the tank needs to be air tight ...i broke a fitting on top of the tank it looks like its a vent, it runs parallel with the fill tube.. i dont know if the tank has to be pressurized to get fuel..i can hear the pump priming up but i got no fuel at the t.b.i. do i need to some how bleed the line which seems odd to have to bleed it...please let me know if you can help me thanks.........LUCAS

The tank doesn't need to be pressurized. As far as the vent you are refering to, it is an emission problem, but won't prevent the pump from working. Did you replace the fuel filter?

If the check engine light does not illuminate then you need to verify power and ground are good to the pcm.