Question about 2005 Chevrolet Uplander LS

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Loose fuel relay. Hit a bump and car stalls.

Hit a bump and car stalls. Fuel relay very loose.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 87 CHEVY BLAZER, FUEL PUMP NOT GETTING POWER

It's your Electronic Control Module (ECM). There is a short in the computer. You're going to have to replace it. The same symptoms occurred in my vehicle, had a mobile mechanic come to my house and fix the problem. Quoted me $350 for parts (used) and labor.

Posted on Mar 24, 2009

  • 6 Answers

SOURCE: 92 Chevy Suburban Electrical Fuel System

Check fuel flter at fuel pick-up intank (looks like a small wire sock). Remove fuel filter and fitting at fuel rail. Blow out fuel lines w/about 35lbs air press. Ck electrical @ relay - should be 4 connectors - one is key on hot/one is always hot/one is ground and last is hot to fuel pump. Good Luck

Posted on May 03, 2009

ZJLimited
  • 17970 Answers

SOURCE: 2000 Malibu Starts then looses

Keep in mind that you have several components there:
- Fuel Pump Sender Assembly,
- Fuel Pressure Regulator,
- Fuel Rail Assembly, and
- Fuel Injectors.

1.- Fuel Pump (Sender Assembly) - TESTING
Refer to the accompanying charts for fuel pump diagnosis and testing.

The fuel injection system remains under pressure, even after the engine has been turned OFF. The fuel system pressure must be relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.

eb744a2.jpg

Fig. 3.1L engine OBD system check to be done before fuel pump relay circuit diagnosis


26456ba.jpg

Fig. 3.1L engine fuel pump relay circuit diagnosis (1 of 2)


b3b739d.jpg

Fig. 3.1L engine fuel pump relay circuit diagnosis (2 of 2)


db78a73.jpg

Fig. View of the fuel pressure test port (Schrader valve)-3.1L engine

A - 3.1L engine fuel system pressure test (1 of 4)
B - 3.1L engine fuel system pressure test (2 of 4)
C - 3.1L engine fuel system pressure test (3 of 4)
D - 3.1L engine fuel system pressure test (4 of 4)

c8a9798.jpg

Fig. The fuel pump/fuel sender module assembly is mounted in the fuel tank


2.-
Fuel Pressure Regulator - REMOVAL & INSTALLATION

(the fuel pressure regulator, which is located on the fuel rail assembly)

NOTE:
Before removing the fuel regulator assembly, place a clean shop towel under the regulator to catch any fuel drips

  1. Properly relieve the fuel system pressure.
  2. If not done already, disconnect the negative battery cable.
  3. On the 3.1L engine, remove the intake manifold plenum, as outlined in .
  4. On the 2.4L engine, remove the fuel rail. Refer to procedure earlier in this section.
  5. Detach the vacuum line from the regulator.
  6. Place a shop towel under the regulator to catch any fuel that may drip out. Unfasten the fuel pressure regulator retaining screw, then remove the regulator by twisting and pulling it from the fuel rail.
  7. Remove and discard the O-ring seal. Inspect the filter screen for contamination and replace if necessary.
To install:
  1. Prior to assembling the pressure regulator to the fuel rail, lubricate the new rail-to-regulator O-ring seal with clean engine oil.
  2. Place the O-ring on the pressure regulator and install the pressure regulator to the fuel rail.
  3. Install the retainer or coat the regulator mounting screws with an approved thread locking compound and secure the pressure regulator in place. Tighten the mounting screw to 76 inch lbs. (8.5 Nm).
  4. If removed, install the fuel rail assembly to the engine.
WARNING The fuel return pipe must be connected before tightening the regulator retaining screw to prevent the regulator from rotating. Rotation of the regulator could damage the retainer and spacer bracket and lead to a fuel leak at the regulator inlet.
  1. Connect the fuel feed line and return line to the fuel rail assembly, use a backup wrench on the fittings to prevent turning.
  2. Attach the vacuum line to the regulator.
  3. On the 3.1L engine, install the intake manifold plenum.
  4. Connect the negative battery cable. Turn the ignition to the ON position for two seconds, then turn it to the OFF position for ten seconds. Turn again to the ON position and check for fuel leaks.

continue...

Posted on May 24, 2010

  • 69 Answers

SOURCE: Loose fuel pump relay.

JUST BEND THE PINS ON RELAY SLIGHTLY AND REFIT

Posted on Nov 19, 2013

johntunney
  • 887 Answers

SOURCE: Loose female recepticle for fuel pump relay. Relay must be forced into a specific position. when I hit a bump the car stalls and thye relay hs to be repositioned.

don't do it. its to much work. just take the relay and use some pliers to twist the prongs don't bend but twist so they are on a 30 degree angle then push it in. this will make a good connection forever. a little dielectric grease will also help the connection

Posted on Nov 22, 2013

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don't do it. its to much work. just take the relay and use some pliers to twist the prongs don't bend but twist so they are on a 30 degree angle then push it in. this will make a good connection forever. a little dielectric grease will also help the connection

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JUST BEND THE PINS ON RELAY SLIGHTLY AND REFIT

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