Question about 1994 Jeep Grand Cherokee

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I replaced the ignition coil diatributor fuel pump and truck still want turn over

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  • mermaid_4560 Mar 19, 2009

    replaced fuel pump in grand cherokee and now it will not start does it have a reset button anywhere

  • Rob McFarlane May 11, 2010

    Does the vehicle not turn over, or just not start? What engine? Are there codes? does the fuel pump run? does it have spark?

  • Richard Scordino May 11, 2010

    How about doing some testing including a code check instead of wasting $ on guesses?

  • mike loshbough
    mike loshbough May 11, 2010

    how about crank sensor?

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  • 4 Answers

Have you reset the factory alarm?

Posted on Mar 28, 2009

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Just lost all power


Many car fuel pumps trigger off the ignition coil, so you need to determine if current is getting to the coil when you turn on the ignition. A bad coil may give no spark and no fuel pump operation too.

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Without a voltmeter and a wiring diagram, you're in a bit of a fix. But I would be wondering why the ignition switch isn't sending power to the coil primary positive terminal, and why it isn't causing the fuel pump to be turned on, too.
Is your check engine light on with key on? The computer should sense ignition is on and briefly turn on the fuel pump through the fuel pump relay, on just long enough to pressurize the fuel line to the injector. But no fuel or fire-you'd better start by checking if the ignition switch has power in and power out, and work your way to the coil.

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2 Answers

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REPLACE DISTRIBUTOR CAP AND ROTOR.AND PLUGS WIRES.IF GETTING NO SPARK TO PLUGS.CHECK SEE IF IGNITION COIL GETTING POWER.IF NOT CHECK IGNITION FUSE.IF POWER GOING TO COIL.FAULT EITHER COIL IS OPEN OR FAULT IN THE IGNITION MODULE IN THE DISTRIBUTOR.

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1 Answer

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1 Answer

Engine will crank over but won't start


Alright, few things you need to do to make be able to pin point what is actually causing the engine not to start. Let see, first of all it could be a fuel pump promblem and for the civic's you can turn your key to the "on" but not starting it to see if you can hear a slight click from where your fuel pump is located which is in the backseat, if you can hear hiss then a slight click after turning your key to on after a few second, then your fuel pump is working. If not check out the fuel pump relay or any fuse pertaining to the fuel pump.  You can do this by switch to another fuse of the apropriate fuse amp. After so, and if the fuel pump cannot be heard with the click or hiss, then it could be your fuel pump.  Secondly if fuel pump is working, and still just cranking, then it could be your ignition coil. If the ignition coild is bad, it wouldn't send spark to the spark plug thus no combustion, and engine would only roll over. So to test this to see if your ignitionc coil is bad.... you can follow this link http://autorepair.about.com/od/troubleshooting/ss/coiltest-manual.htm showing you how to test your ignition coil. If you get no sparks, most likely it is your ignition coil and it will need to be replaced.

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3 Answers

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2 Answers

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First check any ignition/fuel related fuses. Check to make sure you have 12 volts coming into the pump and coil. If nothing to the fuel pump replace the fuel pump relay - if you do have power to the fuel pump then replace the pump. If nothing is coming to the coil it is either an ignition relay or a wiring issue. If you have 12 volts to the coil but no spark then replace the coil.
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1 Answer

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