Question about Jeep Cherokee

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88 Cherokee 4.0: ran good when I parked it 3 months ago because of a failed clutch slave cylinder. When I tried to start it two months ago, it started briefly, then quit and won't re-start. Checked for spark, I've got spark. Checked cps for correct ohm reading, ECU connector at firewall for clean contacts, various vacuum lines, plug wires are new, plugs are new, coil is new. Fuel issues? Other ideas?

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I would think your fuel pump needs to be replaced. Change the fuel pump and fuel filter and then run some fuel system cleaner through the gas tank.

Consult your vehicle's owner's manual for the location of the test port. Attach the end of the pressure gauge into the port indicated. Each vehicle is different as to the location, so make sure to check your manual first.

  • Step 2 Turn the key in the ignition and monitor the gauge. Write down the number of the pressure while the car is running.
  • Step 3 Check the pressure against what is specified in your manual. Generally, a vehicle needs between 30 and 80 psi in order to run smoothly, but your vehicle may be different. If you pressure matches what is the manual, then your fuel pump88 Cherokee 4.0:  ran - 2.gif is working correctly.
  • Step 4 If your pressure is high, then you will know that the fuel pump is running richly, which can lead to poor mileage or black smoke. It is probably time for a new fuel pump.
  • Step 5 If your pressure is too low, that means your fuel pump is a clogged filter. Have it replaced or you could be faced with poor engine performance.
  • Posted on Sep 04, 2009

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