Question about 1996 Dodge Grand Caravan

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Two new fuel pumps in my 1996 grandcaravan. Still no fuel presure at rail. New fuel filter also. The regulator is built into the pump and the van runs on either.

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Are you getting at least 12 volts to the harness on the pump and also is it grounded good? Have you checked the fuse for the fuel pump and the fuel pump relay? Is the ASD relay coming on when you turn the switch to run position? Several more things to check to solve your no start condition.

Posted on Nov 07, 2014

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  • maxmhill Nov 08, 2014

    Ive cheked the relay and fuse i hear the realay clicking ill try swaping it with the horn. And ill test for 12 volts at pump i guess it could be geting low voltage and not puting out full presure. I think runing on either should have tested the computer but if theres no fuel at the rail i know it wont run. I will test the injectors just to iliminate them any input is helpful thanks

  • Adam Scott Roberts Nov 08, 2014

    If it runs on ether then that does mean the computer side is working as far as the ignition system anyway. The pump still must not be getting power or ground for there to be no pressure at the fuel rail.

  • maxmhill Nov 08, 2014

    It turns on with the key i hear it. But again thanks for the input. Im geting frustrated as this is my only transportation atm. Third day of working on it but thank you for help

  • maxmhill Nov 08, 2014

    It turns on with the key i hear it. But again thanks for the input. Im geting frustrated as this is my only transportation atm. Third day of working on it but thank you for help
    i guess if i understand u your saying its not pumping when its cranking or trying to run im lossing power that way to pump???

  • maxmhill Nov 08, 2014

    I direct wired the pump hott it runs but nothing coming out of the outlet side of the new filter

  • Adam Scott Roberts Nov 09, 2014

    The wires may be crossed in the harness making the pump run backwards. Just a suggestion.

  • maxmhill Nov 10, 2014



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Posted on Jan 02, 2017

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SOURCE: 1996 astro van stopped running

Sounds like dirty gas and the fuel filter is clogged...try changing the fuel filter...some are under the car, but most are mounted against the firewall in the engine compartment.

Posted on Apr 19, 2009

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Just put a new delphi fuel pump in my1996 grand caraban did this twice. Still im geting no pressure at the shrader vaulve. Van runs on either. The pump and regulator are the same assembly is the pump the...

Not likely. It is also not likely that the regulator is in the fuel pump assembly. Some people mistake the check valve in the pump as a regulator. Also, some vehicles have a pump module which includes the fuel gauge sensor and that can be mistaken as the regulator by some DIYers. The caravan uses a return-loop fuel system. This means that the pump is cycling fuel from the tank to the fuel rail on one line and the fuel that is not needed at the injectors flows back through another line to the fuel tank. This is done to prevent the pump from building up too much pressure and allows the fuel flowing through the pump to keep it cool. Because of the looping system, there needs to be a flow restrictor (aka regulator) at the fuel rail to provide a constant pressure source for the injectors. The regulator is normally at the end of the rail and will have a vacuum line attached. Pull the vacuum line, place a rag at the vacuum port, and crank the engine. There should be no fuel coming out the port. If any fuel comes out of the vacuum port, the regulator is faulty. The regulator could still be faulty even if there is no fuel from the port, but fuel leakage is an easy way to be sure. If the regulator is not providing proper restriction to maintain pressure, then the fuel simply flows in a circular loop from and back to the fuel tank without enough pressure to allow the injector to do their thing,

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1 Answer

No fuel pressure on gauge is it the presure regulator bad

First check or just replace the fuel filter. Usually located under the car in front of the rear axle, drivers side.
Next, the fuel pump may be worn out. Usually they get loud or stop working (running).
Next, check the fuel pressure regulator. Usually located on the front fuel rail, drivers side.
Is the vacuum line attached? Not leaking or rotted?
Also, do you smell a strong fuel odor when it won't start? May be one or more stuck-open injectors, or the coil pack(s) is/are bad.
Checking these in the order listed will more than likely fix your problem. Try a new fuel filter first. From there have someone check the fuel pressure regulator and then the pump. If you are in need of a new pump, take my word for it and spend the money to get one from a Dealer, and not from your favorite parts store. Most parts store parts are made in China and they are JUNK. At least get a OE pump.

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Forget the injectors. They worked before the new pump,why go there.
The new pump maybe defective,it happens, I suppose.
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