Question about 2000 Jeep Cherokee

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92 Jeep Cherokee will start but stalls right away

Have good fuel pressure and flow, just changed the crank. pos. sensor.
plugs and wires are fairly new.

when you throw the jump box on it it cranks fine, starts right away and stalls about a second later. will do this over and over.
like i said, it starts NO PROBLEM. just won't stay running.
was a perfectly good running jeep. sat for about 2 months.
i'm totally clueless..please help

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  • onewheel1000 Jan 09, 2009

    i took off fuel line at fuel rail and it primes and shoots fuel 3 feet while cranking, thats why i was leaning away from a fuel problem.

    pump does make a loud noise when it runs after you turn the key

  • onewheel1000 Jan 12, 2009

    new fuel pump and new fuel filter. still starts right up and shuts down right away. but i can get it to run off brake clean thru intake

  • onewheel1000 Jan 13, 2009

    gonna try and runnin hot lead w/fuse from ignition to pump. thinkin fuel relay is two stage. Start and run. I'm hoping at least

  • onewheel1000 Jan 13, 2009

    Its a fuel issue but not with the pump or the rail.

    what controls the injectors and would tell then to shut down right after starting, again it will run fine if i spray carb clean in throttle body.




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Check for cracked fuel lines back by filter. Also have someone with OBD tool download trouble codes if any.

Posted on Jan 09, 2009

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The problem is ether your pump or filter i had the same problem with mine

Posted on Jan 09, 2009

  • dirt_gallant Jan 15, 2009

    did you check all the sensors is you did take the throtle body and clean it up in good shape sorry i didint get back sooner i was on a fishing trip



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2000 jeep cherokee starts then stalls in approx 3 sec 4.0 has new crank sensor

I am going to assume that it will not run even if you push on the accelerator pedal?
Can you install or attach an old timing light to the spark plug wires, turn it one and try to start it. The light should flash with the engine running, but if it shuts off at time of engine die, and the engine is still spinning, you are losing spark, My suggestion is the cranks shaft sensor on bell housing.
Second, install a pressure gage on the test port on the fuel rail and watch it as you start the engine, fuel pressure should not drop as the engine dies, if it does, the pump is not working correctly. There are two modes of power to that pump, one to start and timed, for only a few seconds to prime the system, and one to run continuously. Find the wires going to the pump at the tank. Connect test light to those wires and watch what happens during crank and at stall, You should not have the pump shut off and the engine dies.
If you have spark, and fuel pump working, when did you last change the filter,,but I put that LAST.
It has to be one or the other of these.
Good Luck

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