94 dodge caravan 3.3. Fuel pump sends gas thru filter, but no fuel at fuel rail valve even when cranking engine. What could be the prob?

I can provide you with a general fuel line system diagram for a 2006 Dodge Grand Caravan with a 3.8L engine. However, keep in mind that the specific layout of the fuel lines in your vehicle may vary depending on the trim level, optional equipment, and other factors.

Here is a basic diagram of the fuel line system for a 2006 Dodge Grand Caravan with a 3.8L engine:

Fuel tank
Fuel pump
Fuel filter
Fuel pressure regulator
Fuel rail
Fuel injectors
Throttle body
The fuel tank stores the fuel for the vehicle. The fuel pump, located in the tank or along the frame rail, pumps fuel through the fuel filter, which removes impurities and debris. The fuel pressure regulator helps maintain the correct fuel pressure in the fuel rail, which supplies fuel to the fuel injectors. The fuel injectors spray a fine mist of fuel into the intake manifold, which is then drawn into the engine through the throttle body.

I hope this information helps! Let me know if you have any other questions.

The PCM /ECM won't energize the fuel pump relay while cranking the the engine ,unless it get's rpm signal from the crank sensor . Is there spark at the plug wires ?

the fuel rail is located under the intake plenum

you should check the fuel pressure at the reed valve on the fuel rail,you need at least 55psi of fuel pressure to start and keep running.

you need to check fuel pressure at fuel rail,
check with tester at reed valve,you will need at least 55psi of fuel pressure to start the van.

Likely suspects are a plugged fuel filter and/or a worn fuel pump. Replace the fuel filter first. Try a bottle of fuel system cleaner/water pick-up. If it still has problems, rent a fuel pressure gauge and read the engine-running pressure at the test port which is located on the fuel rail that is mounted just over the injectors. It looks very much like a tire valve with a screw-on cap. The pressure should be about 45 PSI. If much lower, replace the fuel pump. Hope this helps.

if there is fuel presure getting to fuel rail,,, check foe spark if u have spark(ignition fire) then install new crank sensor

Dear Ron, you have replaced fuel pump and fuel filter. You have checked the fuel pump relay. Still no fuel in rail. Try bypassing fuel relay with jumper from batt to fuel pump. If o/k then check computer for ground to relay. This system uses a relay that is operated by the computer that supplies a ground for the relay to operate. The wire color is green,16 gage. If the ground is not available then "no fuel" Check this with a test light. Key on and crank apply test light to ground wire and other end of light to ground. You should hear relay click and get fuel. If this checks out you will need to replace computer or get creative with rewiring the relay so it works without computer input. Good luck Moe

I would check the fuel pump relay and the fuse for the sending unit and also would take the line off just in front of the fuel filter to see if I am getting fuel to that point but check the fuel pump relay and the fuse first

First ck for fuel pressure.Turn key on and listen for buzz sound near rear in gas tank. This is your fuel pump and when you cycle key off then on it should make noise for 2-3 seconds. If not have someone bang on fuel tank with the palm of their hand while you crank engine if it starts replace fuel pump. If no noise remove black cap on fuel rail on top of fuel injectors and push shrater valve with small screw driver and fuel should squert out. (this valve is the same as a tire shrater valve that you put air into) If not or very little fuel comes out then your fuel pump is bad or fuel pump wiring.Before replacing fuel pump take a test light and check the power wire and ground wire at fuel pump while cranking engine.If fuel system ok reply back for next step. Joe ASE Master Tech