Question about 1988 Dodge Ram Wagon

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On my 1988 dodge d100 i have no vacuum to the fuel pressure regulator can anyone help

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: missing vacuum hose from fuel pressure regulator on 1991 mercedes

the fuel pressure regulator vacuum hose usually runs to the upper air intake somewhere, check for the fitting on the upper air intake or throttlebody.

Posted on Feb 21, 2009

emissionwiz
  • 75824 Answers

SOURCE: 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.

Posted on Mar 10, 2009

csmock132
  • 4669 Answers

SOURCE: fuel pressure regulator

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

  • 7 Answers

SOURCE: Checked Fuel Pressure Regulator on 93 Ford Tempo GL 2.3 Liter.

As far as I know without checking it personally it sounds like it could be one of three things (in order from easiest to hardest). Clogged air filter, worn timing chain, leaking head gasket. To check for the third go to Auto Zone and get them to do a compression check, its free. I can't remember off hand but if the 93 has a TPS (throttle position sensor) that could also cause an irratic idle.

Posted on Mar 18, 2009

  • 92 Answers

SOURCE: fuel pressure regulator had no vacuum line connected

another engineers wet dream. think of it this way . what is normally in the intake when the engine is running.. answer vacume, hence the regulator gets its vacume without a hose connected to it as its already in a full time vacume chamber.no hose required . ps be carefull to seat the regulator and o rings securely into the housing befor you reattach the secureing metal clip.
good luck chris

Posted on Mar 23, 2009

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2 Answers

Where is the fuel pressure regulator located on a 1988 Dodge B-150 van, 5.2 liter? I've been told it's on the fuel rail. Where is the fuel rail?


If you have throttle-body fuel injection, you don't have a fuel rail. The fuel pressure regulator should be mounted to throttle body.

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  1. Without vacuum applied to the regulator, the 3.3L engine fuel system operates at 55 psi (379 kPa). With the engine idling and the manifold vacuum applied to the regulator, the system operates at approximately 46 psi (317 kPa).
  2. Without vacuum applied to the regulator, the 3.5L engine fuel system operates at 48 psi (331 kPa). With the engine idling and the manifold vacuum applied to the regulator, the system operates at approximately 39 psi (269 kPa).
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Where is the fuel pressure regulator located at on a 1989 dodge D100


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You mean throttle body?

If you cycle the key ,you should hear the
fuel pump (in tank) for 3 seconds,then it
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I assume that the filter is under 30,000 miles
or 4 years old

You will need a pressure gauge if you hear
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If you have 40 lb at the fitting near the manifold
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If it is good the pressure should go up some
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Hi!!
Start by replacing the fuel filter and check vacuum hose to fuel pressure regulator, if that does not solve the problem, check the fuel pressure, borrow a Fuel Pressure Tester from AutoZone, Checkers or similar autoparts store and check fuel pump pressure. They will tell you the correct pressure.
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Hi i have a 1988 ford f150 it idles up and down and always smells like gas also when you floor it or tap the gas after idling for a while black smoke comes out the tail pipes. i'm so sick of it running...


Check fuel pressure regulator by removing the vacuum hose. If idle does not change or fuel comes out of regulator replace it. Otherwise check your injectors one at a time while car is running. If idle does not change replace it.

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2001 dodge durango 4.7 fuel pressure flutters during idle


IF FUEL FILTER HAS BEEN REPLACED.FUEL PRESSURE REGULATOR IS GOING BAD OR NOT GETTING VACUUM.CHECK VACUUM LINE GOING TO FUEL PRESSURE REGULATOR.MAKE SURE ITS GETTING VACUUM.IF YOU SEE GAS IN VACUUM LINE TO REGULATOR.REPLACE FUEL PRESSURE REGULATOR.IF ALL IS GOOD FUEL PUMP GOING BAD.

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