Question about 1990 Pontiac Trans Sport

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How to replace the fuel pump on 1990 pontiac transport

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This work is dangerous and needs to be done out of harms way. ( not in your house or near anything esle valuble that might burn up.) The fuel pump is inside the fuel tank and the tank has to be removed to get it away from the car to remove the pump from the tank. Raise the vehical on a lift and place a transmission jack under the tank. Remove any fuel with your draining equipment and sucure the fuel away from the car to be reinstalled later. Act like thiers fuel in the tank anyway ( thier is) and proceed with care. remmove the bolts theat hod the straps that hold the tank in lower the tank with the jack till you have enought room to get to the lines to disconnected them. You'll need fuel line sapartor tools as the lines snap together and use saparoater tools to disconnect them. unclamp and pull the fuel filler hoses from the tank and note if thier bad or not as they should be replaced if damaged, or rotted. lower the tank and remove from the car. Take the tank out side and away from your building or other cars, and remove the ciclular ring that retains the fuel pumps hanger and gauge assembly. With the ring removed the gauge and pump hanger can be lifter from th tank. It'll have fuel in it and you might set it in a bucket or something to keep fuel from getting all over. Depending on what they sell you at the store you'll either be changing the pump that's in this hanger or changing the whole hanger assembly. They cost more but they have new wires and the gas gauge too and as the pump fails it bruns these parts up too and it's better and safter to change the whole thing. Install the new unit as you removed the old one and you should clean the tank out good if you notice any sign that it's not clean. ( this is the reason for failure of the pump) Miles, or habitally running low on fuel will make the pump fail too.

Posted on Jan 02, 2011


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: How do you change a fuel pump on a 1996 Pontiac

You have to drop the fuel tank and the fuel pump will be located at the top of the fuel tank usually four bolts holding the pump in the tank be careful as fuel vapors are ignitable...

Posted on Apr 25, 2010

Testimonial: "Thanks: I thought so but was hoping there was an access panel from above."

  • 73 Answers

SOURCE: 1999 pontiac montana transport fuel problem

can you jumper the relay or find the red wire by the battery that is nit connected it will have a green connector jump it to positive and see if pump comes on

Posted on Apr 16, 2009

  • 2359 Answers

SOURCE: my pontiac transport cuts out i replaced the fuel

Check the alternator for voltage output,worn belt and belt tensioner.

A health alternator should be produce 13.6-14.8V.

Any less it will put a drain on the battery.
(example: fuel pump,fans and lights)

Base on what you changed already,I recommend you to

1)inspect the tensioner wear indicator (two arrows,lines or dots) if they coming close the it's time to change the tensioner.

2)check the for worn belt. Look for cracks on the belt.

3)charge up the battery and monitor the voltage.

4)get the alternator check.
Most alternator can go up to 100,000 miles.
Some auto part store has a portable battery + alternator test.

Posted on Nov 16, 2009

  • 17970 Answers

SOURCE: How to change the fuel pump on a 1996 Pontiac

For 1996 Pontiac Truck Trans Sport 3.4L SFI 6cyl check this procedure for Fuel Pump... there are two different electric fuel pumps used:
- A medium pressure twin turbine pump for vehicles equipped with Throttle Body Injection (TBI). - A high pressure roller vane pump for vehicles equipped with Sequential Fuel Injection (SFI).
(see Figure 1)


Fig. 1: View of the fuel pump assembly and related components
The fuel pump is mounted to the fuel sender assembly inside the fuel tank. The fuel is pumped to the engine at a specified flow and pressure by the fuel pump. Excess fuel is returned to the fuel tank by the return pipe. The fuel pump delivers a constant flow of fuel to the engine even during low fuel conditions and aggressive vehicle maneuvers.

CAUTION When working on or near the fuel tank, be sure to observe the information molded on the bottom of the tank.
Removal & Installation

  1. Disconnect the negative battery cable.
  2. Properly relieve the fuel system pressure.
(see Figure 2)


Fig. 2: Exploded view of the fuel pump-to-tank mounting components
  1. Drain and remove the fuel tank.
  2. Remove the fuel sender assembly.
  3. Disassemble the fuel pump strainer and the fuel pump: Note the position of the strainer in relation to the pump.
(see Figure 3)


Fig. 3: Remove the fuel tank locking ring with a non-sparking (brass) punch.
  1. Support the fuel pump in one hand, and grab the strainer in the other hand.
    1. Rotate strainer in one direction and pull off pump. Discard strainer.
(see Figure 4)


Fig. 4: Exploded view of the fuel pump components
    1. Remove deflector.
  1. Disconnect the fuel pump electrical connector.
  2. Loosen the two connecting clamps, if equipped.
  3. Place the fuel sender assembly upside down on the work bench.
    1. Pull the fuel pump downward to remove it from the mounting bracket, then tilt the pump outward and remove it from the connecting hose or the fuel pulse dampener.
  4. It is recommended to replace the hose and clamps, if equipped.
CAUTION Do not run the pump unless submerged in fuel
To install:
  1. Push the fuel pump assembly into the attaching hose. Attach the pump electrical wires and fasten the hose clamps to the attaching hose and around the pump body, where equipped.
  2. Place the fuel tank sender and pump assembly into the fuel tank. Use a new O-ring seal during assembly.

Hope this help (remember rated this).

Posted on Jun 04, 2010

  • 4669 Answers

SOURCE: Replacing the fuel pump on a 1990 Pontiac

You have to remove the fuel tank. To do this you have to let the exhaust down, remove the exhaust shields and lower the differential.

Posted on Aug 11, 2010

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Hope helps (remember rated this).

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