Ok when my problem first started I turned my truck off and I could hear my fuel pump still running. I looked underneath and found a wire harness that was shorting out. I took it out and redid all the wires. Then I put it back and try to start my truck but it wouldn't start and now there is no fire getting to the fuel pump or the coil. I also replaced some fuses under the hood that were blown.
Pull out the auto shutdown relay. Try substituting another relay thst is not needed to run the engine, such as the horn relay. If that works, replace the relay. If not, probe the relay socket with a volt/ohmmeter. With the meter set to vdc, connect the black lead to body ground and probe the socket. Thete shou.d be one hot terminal with the key off and two hot terminals with the key on or turned to start.
If those are good, leave your red probe in the terminal that is hot with the key on, keep yhe key on, and probe the other two terminals with your black lead. One of those terminals should read battery voltage, as it is the ground signal from the pcm. The other terminal should also show some voltzge, as it goes to the coil and other loads. After running these tests, let me know the rexults and I will try to diagnose.
SOURCE: 94 dodge ram 1500 5.2 replaced fuel pump still no
U NEED TO CHECK THE FUEL PUMP AND AURO SHUT DOWN RELAY.THEY ARE IN THE UNDERHOOD FUES & RELAY CENTER.U CAN SWITCH THEM 1 AT A TIME WITH A/C RELAY.IF THAT DOES NOT WORK U MAY HAVE A PROBLEM WITH THE PCM
SOURCE: New fuel pump now gas gauge does not work
remove the pump from the tank and your float should be going the sam direction as the tank not cross ways in the tank this will fix fuel guage
Testimonial: "Dude Thanks so much for your reply. I dropped the tank this weekend and there it was facing the wrong direction. Thanks for taking the time to respond"
SOURCE: 1995 dodge dakota 2wd 3.9 no spark to plugs,or coil,orfuelpump
First of all let's explain how the spark gets to the plugs. There is a crankshaft position sensor and a cam sensor. They are what determines when to fire the coils and injectors. The crank sensor is located on the passenger side on top of the bellhousing, the cam sensor is the pickup plate in the distributor. As the engin turns the send refernece pulses to the computer which grounds and ungrounds the ignition coil causing it to discharge and send voltager from the secondary coil wire to the center tower in the distributor cap. The rotor button recieves the voltage and distributes it to the 6 towers (1 for each cylinder) If you say you're getting spark from the rotor that tells me the primary side of the ignition system is working, and the secondary side is working into the distributor cap. I'd check for spark out of the plug wires at the plugs. Pull a wire and insert a #2 phillips screwdriver into it, hol the shaft of the screwdriver aprox 1/8"(no more) from the exaust manifold and observe the spark as someone turns over the engine. You should see a nice blue spark. If theres spark, spray a little gum cutter in the throttle body an crank it, if it fires you have a fuel problem. Install a fuel pressure gauge on the schrader valve on the fuel rail and observe it as you crank it. If theres no fuel pressure maks sure there's fuel in the tank, if so climb underneath and beat on the bottom of the tank with a rubber hammer, the pump may be going bad, sometimes you can jar them and make them run.
SOURCE: 1997 dodge ram won't start. My fuel pump does not
First check any ignition/fuel related fuses. Check to make sure you have 12 volts coming into the pump and coil. If nothing to the fuel pump replace the fuel pump relay - if you do have power to the fuel pump then replace the pump. If nothing is coming to the coil it is either an ignition relay or a wiring issue. If you have 12 volts to the coil but no spark then replace the coil.
Also the fuel pump/relay would not kill the coil.
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