A mechanic replaced the fuel pump unit in tank and exhaust cam but it problem still persist. i have a dodge ram 1500 V6 3.7L. mechanic claims it might be a fuel injector problem or alternator or map sensor or wiring etc.. I'm limited on money
SOURCE: 1996 Dodge Ram 1500 kept stalling while driving now won't start
First off you can test the fuel pump 2 ways
1.have a assistant turn on the ign to on while you listen for the pump to run at the gas cap (gas cap off).
2.find the valve on the fuel rail looks like a a/c or valve stem,take the cap off and press the needle and if fuel comes out then it's not the fuel pump.
But from a lot of EXPERIANCE on dodge engines the stalling and restarting issue is ignition related i.e crank or cam sensor which will throw a diagnostic code of engine misfire xxx cylinders.
So If its one of those sensors then you will not have any spark,and staring fluids will not fire the engine.
As for the headlights flickering they get there power through a relay straight from the battery,so I would look at the relays under the hood and find the one for the headlights and swap it out with the horn relay as most of the relays will have the same numbers.
The crank sensor is about 70.00 and the cam sensor is about 50.
depending on where you get them (dealer or aftermarket)
the cam sensor is the round plastic thing under the dist cap,and the crank sensor is on the pass side under the head into the top of the transmission bell housing and it's a 2hr job to change because of it's location is really hard to get to.
Hint -take the breather off and place a rag over the intake and a board from the radiator core support to the intake to lay on,it has 2 10mm bolts and the wiring harness unplugs from underneath.
SOURCE: 1997 Dodge Ram 1500 5.2 liter won't start
I WOULD SAY IT IS THE COMPUTER {BRAIN} THAT IS WHAT SENDS THE FIREING ORDER AND VOLTAGE AND SETS THE TIMEING SPECK I WOULD SAY CHECK THE COMP
SOURCE: misfire on #6 and #8 cylinder 1996 Dodge Ram 1500
Check the spark plug wiring . There are several places where the wires cross each other. These wire cross points MUST be at right angles to each other. Or you will have a misfiring problem.
SOURCE: how to replace a fuel pump for a 2000 dodge ram
You have two choices.
1. Relieve fuel pressure.
2. Disconnect battery.
3. Lift truck, disconnect fuel lines, filler pipe and pump wires and remove fuel tank,
or lift pickup bed to access top of tank.
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