Question about 1995 Dodge Caravan

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Fuel pressure regulator

How does one know if fuel pressure regulator is bad?Have a 1995 dodge carvan fuel not returning to tank through return line.Line is not blocked.

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  • Anonymous Mar 30, 2014

    I have no fuel flow from the tank. I pressurize the tank to 4 psi and still no flow thru the line.

  • Anonymous Mar 30, 2014

    no fuel flow from tank? I hav pressurized the tank with no results. is there a filter in the tank that could be frozen?

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Have you checked the fuel pressure? If it is high and fuel is not returning, the regulator is bad. If it is low and fuel is not returning, the pump is bad.

Posted on Mar 11, 2009

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1 Answer

How can i test a fuel pressure regulator, and fuel pressure even if i can't get the car started?


The regulator only controls pressure, so it either blocks return to the tank or allows all pressure to flow back. If it blocks flow the pressure would be too high, wide open would keep pressure low.
You connect a pressure gauge to the system and if it is low, block the return line to the tank to recheck.
You may have to bypass the pump relay to keep the pump running during the test.

Mar 19, 2016 | Cars & Trucks

1 Answer

When cranking engine should petrol flow from inlet fuel injector pipe to tank with a degree of pressure?


Probably so. The fuel pressure regulator maintains a set pressure in the fuel rail, and the excess gas is allowed to return to the tank via the return line. There would be some pressure in the return line.

Mar 14, 2015 | Cars & Trucks

2 Answers

Fuel pressure 1998 jeep grand cherokee 4.0 L V6


You should have a test port on the Fuel Supply rail, use a tool from a local auto parts "Tool Loaner program" where you can borrow tools for free,w/a deposit of course,then follow the steps provided;

MPI Fuel System Pressure Test

The MPI fuel system used in vehicles equipped with a 4.OL engine employs a vacuum balanced pressure regulator. Fuel pressure should be approximately 55-69 kPa (8-10 psi) lower with the vacuum line attached to the regulator than with the vacuum line disconnected. System fuel should be 214 kPa (31 psi) with the vacuum line connected to the regulator and 269 kPa (39 psi) with the vacuum line disconnected. CAUTION: Some fuel may be discharged when connecting fuel gauge to fuel rail.
  1. Connect a 0-414 kPa (0-60 psi) fuel pressure gauge to test port pressure fitting on fuel rail (Fig. 7).
  2. Remove vacuum line from pressure regulator.
  3. Start the vehicle.
  4. Note gauge reading. With vacuum line disconnected, fuel pressure should be approximately 269 kPa (39 psi).
  5. Connect vacuum line to pressure regulator. Note gauge reading. Fuel pressure should be approximately 214 kPa (31 psi).
  6. If fuel pressure is not approximately 55-69 kPa (8-10 psi) higher with vacuum line removed from regulator, inspect pressure regulator vacuum line for leaks, kinks or blockage. CAUTION: Fuel pressure will rise to as much as 655 kPa (95 psi) when the fuel return tine is pinched shut, shut engine down immediately after pinching oft fuel return line.
  7. If fuel pressure is low, momentarily pinch shut the hose section of the fuel return line. If fuel pressure remains low, inspect the fuel supply line, fuel filter, and fuel rail inlet for blockage. If fuel pressure rises replace fuel pressure regulator.
  8. If fuel pressure is above specifications, inspect the fuel return line for kinks and blockage.

Capacity Test

  1. Remove the cap from the pressure test port in the fuel rail.
  2. Connect a 0-414 kPa (0-60 psi) fuel pressure gauge to the pressure fitting on the fuel rail (Fig. 7).
  3. Start the vehicle. Pressure should be approxi- mately 214 kPa (31 psi) with the vacuum hose connected to the pressure regulator and 269 kPa (39 psi) with the vacuum hose removed from the pressure regulator.
  4. If the pressure is not to specification, check the following before replacing the fuel pressure regulator:
  • 4a - Inspect the fuel supply and return lines/hoses for kinks or restricting bends
  • 4b - Check the fuel pump flow rate. A good fuel pump will deliver at least 1 liter of fuel per minute with the fuel return line pinched off. If the fuel pump does not pump adequately, then inspect the fuel system for a plugged fuel filter or fuel pump inlet filter (sock). Fuel pump flow rate can be done by connecting one end of an old A/C gauge hose to the fuel test port on the fuel rail and inserting the other end of the hose into a container of at least 1 liter capacity. Run the fuel pump by installing a jumper wire into diagnostic connector terminals D1-5 and D1-6. Be sure to pinch off the fuel return line or most of the fuel will be returned to the fuel tank.

May 19, 2014 | 1996 Jeep Grand Cherokee

1 Answer

1988 Dodge caravan SE. Metal fuel line coming from gas tank to the drivers side rear. what does it connect to? Not talking about the fuel line going to the fuel filter. It fell of and cant find what it...


Sounds like you have a broken fuel return line. The high pressure line goes through the filter and to the injection system, and the unused fuel is returned through the pressure regulator back to the fuel tank.

Jul 01, 2011 | 1988 Dodge Caravan

3 Answers

Fuel flooding cyliders after new gas tank install


If the vehicle is flooding then the pressure regulator is probably bad not registering enough fuel to the system and shutting off the pump in the tank.

Sep 17, 2009 | 1995 Chevrolet Cavalier

1 Answer

I have a 2003 kia sorento ex. When the return line is removed....it starts fine.....but when it is placed back....it wont start. |Also......engine wont start when its hot......until its left off for about...


If you take the fuel return line off and it starts, it should spray some fuel out of the fitting the line slips onto. If not, you are either pulling the vaccum line or the pressure regulator is bad, or you could have a fuel pump going bad. One way to check the regulator is to apply vacuum to the port on the regulator and turn the key to "run" not start. With vacuum applied, fuel should run out of the return line fitting. If not, bad regulator or weak pump, maybey even a clogged fuel filter. If so, vacuum leak or blocked hose. Let me know if this helps :)

Jun 15, 2009 | 2003 Kia Sorento

2 Answers

MY 1995 JEEP WRANGLER MOTOR STOPS ALL OF A SUDDEN AS I AM GOING DOWN THE ROAD. IT WILL TURN OVER USUALLY RIGHT AWAY, BUT WILL DO IT AGAIN AT ANY TIME OR NOT. I HAVE REPLACED THE CRANK SENSOR AND ...


I had a problem with a fuel return line that caused my 95 YJ to do the same thing. It was getting flooded after a few short miles, and would not start for a while. You can buy a fuel pressure gauge and check the fuel pressure, if the pressure is to high that might be your problem. I took my fuel return line off after checking the pressure and tried to blow thru the line with my mouth and could not. After dropping the fuel tank I discoverd that my skid plate was dented in, causing the bottom of my fuel cell to be pushed up and the end of the fuel return line (in side the tank) to be blocked. Good Luck, and if that ends up being the problem you may want to replace your spark plugs, they may have been fowled because of the excess fuel.

Apr 15, 2009 | 1995 Jeep Wrangler

2 Answers

How do you changs a fuel pump in a 1995 Dodge


You MIGHT not have to drop the tank. On the 95 LHS (same frame) you can go through the trunk. take the trunk lining out. Underneath it near the back seat there may be an access panel. If so it will make it MUCH easier to replace! Worth the time to check it out!

Apr 12, 2009 | 1997 Dodge Intrepid

1 Answer

No gas going through fuel pressure regulator on 1995 dodge carava


I doubt the regulator is bad, the fuel pressure regulator is after the injectors in the return stream to the tank, more likely it is the fuel pump.

Mar 10, 2009 | 1995 Dodge Caravan

2 Answers

The fuel pump is not pumping the fuel.


Is the fuel pump actually coming on??? If it isn't, I would start by checking for a fuel pump relay.  This is usually located up in the engine compartment in a black box on the drivers side.  Relays are small black boxes approx 1"x1".  These have a tendency to go out just like fuses.  Also double check your fuses.  If you suspect a that a relay is bad, you can interchange them with other relays that look the exact same to see if they really are the problems.  These relays are very quick and easy to change and are very cheap.  They usually run no more than $10-15.
Any further questions, feel free to ask.

Feb 03, 2009 | 1995 Chevrolet Lumina Apv

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