Question about 2004 Chevrolet Cavalier

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If the fuel pump doesnt make a sound when key is turned on, is that the sending module or the pump it-self?

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You will have to disconnect the fuel pump and check for voltage going to it , then connect a live to it if it doesn't run then the pump is at fault

Posted on Nov 10, 2010

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No fuel, no spark ignition module good.


one word --immobilisor try the spare key

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Fuel pump driver module location


Fuel pump is actuated by the PCM. engine computer.The fuel pump module it self is in the tank. ie pump, gauge sending unit.

Dec 06, 2012 | Lincoln Navigator Cars & Trucks

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How to replace fuel module regulator


to replace the fuel pump module.first you need to relieve the fuel system pressure.turn off radio first, then disconnect the negative battery cable.drain fuel from fuel tank.then then safely raise support car on jack stands. make sure sitting on solid level ground then remove the fuel charcoal canister hoses and vent line remove disconnect fuel pump. disconnect fuel pump electrical connector and remove fuel filler hose from fuel tank then remove the fuel tank from the vechicle.the heat shield and the rear exhaust system may have to be remove if you problem dropping the fuel tank.once fuel tank dropped you need snap ring pliers to remove the fuel pump module retaining ring.disconnect the fuel pump sending unit.disconnect the fuel pressure sensor and fuel pump module electrical connector .if you need help to replace the fuel level sending unit.you need a haynes repair manual.it has instruction how to remove and replace the fuel level sending unit.but most of the time the whole new fuel pump module come with new fuel level sending unit.if you are replacing fuel pump.when done put every thing back visa versa. be very careful working around gasoline and fuel tank.dont smoke.becareful dont make no sparks with wrenches when removing gas tank.wear safety glasses and have a helper at all times. dont work under vechicle by your self.

Apr 11, 2011 | 1999 Oldsmobile Alero

2 Answers

Wont start, checked the fuse, cant seem to locate fuel filter.


Turn the key to the ON position without starting the car
You should hear the fuel pump running for 5 seconds to prime the fuel up to the engine so it can start. If no sound is coming from the fuel tank area which can be heard with the drivers door opened in a quite area the oil sending unit on the engine needs to be looked at. If its bad the fuel pump will not prime. If the oil sending unit is good the fuel pump is at fault instead
Oil pressure to your engine achieves to close the circuit to this switch which the computer senses. When the oil pressure is up to normal standards the PCM shuts that circuit off and turns on the fuel pump relay

Jun 22, 2010 | 2004 Chevrolet Malibu

2 Answers

Changing a fuel pump in a 1999 VP.


Things You'll Need:
  • Ratchet and socket
  • Wrench set
  • Floor jack and 2 jack stands
  • Ratchet extension
  • Fuel tank sending unit wrench number 310-123
  • Screwdriver
  • Slip joint pliers
  • New O-ring seal
  • Clean engine oil
Relieve the Fuel System Pressure
  1. Step 1 Detach the splash shield from the frame rail located underneath the driver's side door. Use a ratchet and socket.
  2. Step 2 Unplug the electrical connector you will see after removing the splash shield. The connector leads to the fuel pump module.
  3. Step 3 Start the engine and let it idle until it stalls. Then crank the engine for about 5 seconds to relieve the remaining fuel pressure from the system. If the engine does not start due to a bad fuel pump, crank the engine to make sure fuel pressure is relieved.
  4. Step 4 Turn the ignition key to the Off position.
  5. Remove the Fuel Pump
  6. Step 1 Disconnect the ground, battery cable from the battery using a wrench.
  7. Step 2 Jack up the rear of your F-150 using a floor jack and support it on 2 jack stands.
  8. Step 3 Remove the tank shield if your particular model is equipped with it using a ratchet, ratchet extension and socket.
  9. Step 4 Support the fuel tank with the floor jack.
  10. Step 5 Disconnect the straps holding the tank to the truck's body using the ratchet, ratchet extension and socket.
  11. Step 6 Lower the fuel tank just enough to gain access to the fuel lines, vapor lines and fuel pump electrical connector on top of the tank.
  12. Step 7 Disconnect the fuel lines and vapor lines from the sending unit/pump module. Press the lock tabs on the lines quick connectors and carefully pull the lines from their fittings. Then unplug the pump-module electrical connector.
  13. Step 8 Release the sending unit/pump module by turning the lock ring counterclockwise using the fuel tank sending unit wrench 310-123 or equivalent. See the Resources box and Tip boxes at the bottom of this article for more information.
  14. Step 9 Lift the sending unit/pump module off the tank carefully and discard the O-ring seal underneath the flange of the module.
  15. Install the Fuel Pump
  16. Step 1 Remove the old fuel pump from the module using a screwdriver and a pair of slip joint pliers and install the new pump on the module.
  17. Step 2 Lubricate the new O-ring seal with clean engine oil and lay the seal on the fuel tank opening.
  18. Step 3 Install the sending unit/pump module in the tank and turn the lock ring clockwise using the fuel tank sending unit wrench.
  19. Step 4 Lift the fuel tank just enough to attach the fuel lines, vapor line and plug the pump module electrical connector.
  20. Step 5 Raise the fuel tank to set it in its mounting place and secure the tank straps using the ratchet, ratchet extension and socket.
  21. Step 6 Install the fuel tank shield using the ratchet, ratchet extension and socket, if you had to remove it.
  22. Step 7 Lower your Cadillac Deville.
  23. Step 8 Connect the ground, battery cable using the wrench.
  24. Build Fuel System Pressure
  25. Step 1 Plug the electrical connector located on the frame rail underneath the driver's side door.
  26. Step 2 Attach the splash shield to the frame rail using the ratchet and socket.
  27. Step 3 Turn the ignition key to the "On" position for three seconds to let the fuel system build pressure. Then turn the key to the "Off" position. Repeat the cycle three times to make sure the system has enough pressure.
  28. Step 4 Start the engine and check for fuel leaks.
Good luck and do rate this solution, please.

Mar 20, 2010 | Jaguar Vanden Plas Cars & Trucks

1 Answer

2002 monte carlo fuel gauge doesnt work,pump works ok.


It is likely the fuel level sending unit. I had a customer with an 03 Monte Carlo that the pump went out and the fuel gauge hadn't worked in about a year. We replaced the fuel pump module and it took care of both problems. I believe the sending unit is available separately from the complete module.

Jan 10, 2010 | 2002 Chevrolet Monte Carlo

1 Answer

The fuel pump doesnt come on and there is no spark.....


Check for the fuse for the fuel pump and the relay. Other than that it may be a wiring issue or a computer module issue.

Dec 13, 2009 | 1993 Jeep Wrangler

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Fuel pump issue, 2004 chevy avalanche


1s the fuel pump should not be that noisy, and the problem u are describing is a defective/worn out fuel pump, it is taking time to built pressure, replace the fuel pump and don't forget to replace the in line fuel filter as well.

May 26, 2009 | 2004 Chevrolet Avalanche

1 Answer

Fuel pump relay & fuel pump


when you turn the key on the pump should run to purge the system . so now you have fuel pressure for starting. this stage lasts about 10 seconds then the fuel pump doesnt turn on again till the computer see's oil pressure then turns the pump on. if the inertia switch has been activated it wont send the first amount of fuel.

Jul 26, 2008 | 1996 Ford F150 Regular Cab

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