Question about 1998 Oldsmobile 88

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I had my fuel pump replaced ever since the locks go up and down continually also the lights come on

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  • Pam Ambrose
    Pam Ambrose Apr 21, 2009

    ya i figured that much

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  • Master
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The fuel pump woul have nothing too do with that ,youve got a short somwhere!!!

Posted on Apr 21, 2009

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2007. Why won't it start?


When you run gas tank down to the light coming on it is hard on the fuel pump. May need to replace or repair fuel pump . They don't give you a warning light for the fuel pump going out.

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When my fuel get near 1/4 tank my jeep cuts off continually while driving. It starts fine and runs fine in park but wont drive for long. Especially on highways. What could be the problem?


possible fuel pump or pump relay is over heating --the fuel pump uses the gas to keep cool when at lower levels in tank it warms up pulls higher amps and shuts off --pump on its way out not putting out enough pressure -same with relay if pump starts pulling higher amps heats up relay and it opens when cooled down work normal ----other is vapor lock but ur evap usually throws a check engine light but could be a problem

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Why does my 1995 Lexus ES300 continuously stop when I drive it? I have run out of ideas


When the engine stalls;
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I have 3.1 L motor that continues to stumble even after the replacment of plugs,wires,cap&rotor and fuel filter and also the check motor light does not come on just the check anti-lock brake light but


Gabriel,

The first question I have is how many miles on the Lumina? If well over 100,000 Miles I strongly suspect a clogged Catalytic Converter. Before all the routine maintenance was the vehicle running normally? Another condition could be a worn out fuel pump. These are electric pumps in the fuel tank and typically will eventually fail to supply adequate fuel pressure and volume of fuel required for normal running conditions. Have an ASE Certified Technician check the Fuel Pressure and Flow Rate to determine if it is within manufacturers specifications. I had a 1994 Pontiac Transport with 175,000+ Miles and the Fuel Pump failed. I replaced it myself and then the Catalytic Converter clogged up. Both problems caused low power and stumble conditions.

Does the Check Engine Light come on when the Ignition switch is turned on before starting the engine? If not, you obviously have a bad bulb in the Instrument Cluster. This requires carefully removing the Instrument Cluster and partial dis-assembly to replace the bulb(s). I strongly suggest replacing ALL the Bulbs in the instrument cluster because of the age of the vehicle.

Is the 3.1L engine fuel injected or carburated? If FI see a professional.

Rapid Robert

Dec 08, 2011 | 1995 Chevrolet Lumina Apv

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Fuel can't continue flows to injection pump so thats why the engine cant continue to run


This problem relates to low fuel pressure.Get the fuel pressure checked.Most probably weak fuel pump and clogged fuel filter.Both are to be replaced.Still to confirm get fuel pressure checked.It can be checked at any local car garage repair store.---------

This will solve the problem or point you towards the cause of problem. Thank you for using fixya.

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it may be fuel pump ? how much fuel is in the tank ? these trucks are famous for their fuel pumps overheating when the fuel level gets below half or sometimes evem a quarter tank. if the fuel tank is full you may want consider replaceing the fuel filter (as a good routine maitenance procedure)and see what happens then.

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If the light is flashing than the anti-theft is activated. Try locking and unlocking the car with the door lock button on the drivers side. lock and unlock a minimum of three times until the light quits flashing. If the car has loaded up (smells like fuel when cranking) then pull the fuel pump fuse and hold the throttle all the way down when cranking to clear the cylinders, then replace fuse and repeat the procedure with the lock switch if the light is still flashing. It should fire right uo if the light is no longer flashing and the fuse (15 amp) is put back in.

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How to change a fuel pump in a 2000 chevy blazer


Good Day,

I am assuming that you have the 4.3L V6.

The fuel pump is always a pain on trucks becasue you have to remove the tank to gain access. The pump is bolted in on the top side of the tank. I hope it doesn't have a full tank of gas as it needs to be drained(re-use when job is complete). Not to mention pulling a tank that's full of gas very heavy.
See this link for an overview:

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a13e9

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a145a

Here's how you test the fuel pump relay, and fuel pump:

  1. Turn the ignition OFF.
  2. Remove the relay.
  3. Locate the two terminals on the relay, which are connected to the coil windings. Check the relay coil for continuity. Connect the common meter lead to terminal 85 and positive meter lead to terminal 86. There should be continuity. If not, replace the relay.
Fuel Pump
  1. Turn the ignition key OFF for ten seconds.
  2. Turn the ignition key to the ON position but do not start the engine.
  3. You should here the fuel pump operate for two seconds (a light electrical humming sound).
  4. Apply a 12 volt fused jumper wire to the fuel pump prime (test) connector. This should be located in the driver's side of the engine compartment. The fuel pump should operate.
  5. If the fuel pump does operate, remove and test the relay. If the relay is defective, replace the relay and repeat the test.
  6. If the relay is operating properly, connect a grounded test light to the fuel pump relay control wire (green with white stripe) at the relay. Turn the ignition switch to the ON position. The test light should illuminate for two seconds and go out. If the test light does not illuminate, check the relay control wire for continuity and repair as necessary, then repeat the test.
  7. Connect a grounded test light to the feed wire (orange) at the relay and turn the ignition key ON. The test light should illuminate. If the light does not illuminate, test feed wire for continuity and the fuse in the underhood fuse relay center. Repair as necessary and repeat the test.
  8. If the fuel pump is still not functioning, connect a fused jumper wire between the feed (orange) wire and the fuel pump motor (gray) wire at the relay. The pump should operate.
  9. If the pump does not operate, check the fuel pump motor wire for continuity and repair as necessary.
  10. If the pump will still not operate, replace the pump.
  11. If the pump does operate, start the vehicle and remove the relay. The vehicle should continue to run. If the vehicle stalls, check the fuel pump/oil pressure switch and its wiring. Repair as necessary and repeat the test.
Also see figure 4 which is digram 3 from this link, this is the schematic on the fuel pump, the fuel pump's hot wire is tan with a white stripe, if you can test the voltage of this wire you can confirm it is not an electrical problem.

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528008f3ce

Also be sure to releive the fuel pressure before servicing

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a1468


  1. Disconnect the negative battery cable.
  2. Loosen the fuel filler cap to relieve fuel tank pressure.
  3. Connect fuel pressure gauge J-34730-1A or its equivalent to the pressure connection. Wrap a shop towel around the fitting while connecting the gauge to prevent spillage.
  4. Install the bleed hose into an approved container and open the valve to bleed the system. The system is now safe for servicing.
  5. Drain any fuel remaining in the gauge into an approved container.
Let me know if any of this is jibberish to you and I can clarify further.

Good Luck again, and feel free to ask anymore questions.

Jul 03, 2008 | 2000 Chevrolet Blazer

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