Just bought a used 96 jeep gran cherokee runs good after about 10-15 mins of driving it will shut down or if i stop somewhere it may not crank back up just bought a coil and replaced the one on the vehicle it ran good for about a day and a half then stoped to get out some where and when i got back in it would not crank got in it last night crunk up and a few sec later my truck shut off.

Marvin

• 85242 Answers
• Posted on Aug 04, 2008

SOURCE: 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

SOURCE: Intermittent overheating on 96 Jeep Grand Cherokee

I had this same problem on a taurus and did all the things you did and found out after that the coolant reserviour bottle had a crack in the bottom of it

SOURCE: 93 jeep 4.0 not starting

check the ignition coil pick up

SOURCE: 93 Jeep Grand Cherokee Won't start

The crankshaft position sensor was seriously problematic in those old jeeps. It's located towards the top of the bell housing slightly to the driver's side I think.

SOURCE: 1995 JEEP GRAND CHEROKEE RAN AND DIED WILL NOT START

IS IT THE 4.0L?IF SO U MAY HAVE A BAD CRANKSHAFT POSITION SENSOR.