Question about 1993 Jeep Cherokee Country

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1993 Jeep cherokee sport, engine will not start.

1993 Jeep Cherokee Sport, 4.0 straight 6, multi port fuel injection.

Vehicle was dying when accelerator was depressed or shortly thereafter. replaced cap and rotor, plugs and wires. Replaced fuel filter problem remained. Replaced fuel pump via chiltons manual guidelines. Relieved fuel pressure by depressing nipple on the test port, and removing gas cap. replaced fuel pump. Engined cranked but will not start. checked fuel lines no gas getting to engine. Blew through the fuel lines to check for obstruction. Gas came out other end through the new fuel filter, no obstruction in the line. Used starting fluid to see if we could get the engine to assist pump to get some fuel through the lines but no dice. Any ideas?

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  • David Karraker May 24, 2009

    We did hear the fuel pump when the key was turned, and while cranking the engine.

  • David Karraker May 24, 2009

    We also pulled out the new pump and plugged it in while out of the tank to see if it was working and it made whirring noises and there seemed to be suction from the bottom of the pump.

  • David Karraker May 24, 2009

    Could the new pump be defective?

  • David Karraker May 24, 2009

    There is no carburator, this is a 4.0 litre straight six with a multi point fuel injection system.

  • David Karraker May 24, 2009

    It is a replacement.

  • David Karraker May 24, 2009

    Thanks alot for your help. I am a Glass installer by trade, 11 years experience. Let me know if you need any advice.

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  • Master
  • 952 Answers

I understand that after you replaced the fuel pump, fuel doesn't get to the engine anymore. Do you hear any winding motor sound whenever you set the car key to pre-ignition? if not, make sure that the fuel pump's fuse and relay is good. if the relay and fuse is alright, try to take the pump out and test it out by giving it 12 volts. See if the pump motor will work.

Posted on May 24, 2009

  • Jac Lawrence Pimentel
    Jac Lawrence Pimentel May 24, 2009

    its highly possible that the new fuel pump that you got is defective. I see no other reason why fuel will not get pumped through the lines. 95% sure thats its the pump. did you get a replacement pump or an original one? its hard to find original parts for a 93' jeep nowadays...

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  • Master
  • 3,917 Answers

Hi,

Yes you are correct, the new pump be defective?

Thank You for your time and patience.

Rating Fixya would be highly appreciated.

Posted on May 24, 2009

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  • Master
  • 1,383 Answers

No your new pump has not problem.
Change your fuel pipe also check your carborator tunning clean your carborator.

Posted on May 24, 2009

  • kishor
    kishor May 24, 2009

    it must be problem with hose pipe from which fuel goes to engine.

  • kishor
    kishor May 24, 2009

    change your fuel hose pipe there must be some issue with it.

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