Jeep was running great, went into the store and wouldnt start. After a few hours got the jeep running and got it home. IT started fine and once I put it in the garage it hasn't started since. I have replaced the spark plugs, crank position sensor, and throttle position sensor. The Jeep turns over but won't fire. There is spark, starter and fuel pump are working. Gauges work, battery is good.
When you got it started at the store did it run normally or was it sluggish? Try a new fuel filter. It is possible that it jumped time.
Check fuel pressure at injector rail.
Do It Yourself Diagnosis and Repair
SOURCE: 93 Jeep Grand Cherokee Won't start
Are you getting spark from coil wire when cranking? If so, check the cap & rotor. If not, the most common failure is the crank sensor. If you have a 4,0, you can find it on the drivers side of the bellhousing, in line with the flywheel, just where it's annoying to work on. There is a test you can make, but I don't have the specific test values or the correct terminals to check. (you can find that info in any half decent manual.
Good luck
SOURCE: '97 Jeep Grand Cherokee Ltd 4.0 liter; Will start but cuts off.
have u replaced the crankshaft position sensor? do u have any computer trouble codes? Kragen or Autozone will run the test for free.
SOURCE: 2000 Jeep Cherokee Sport cranks but will not start.
Pop off a spark plug wire, insert a screwdriver into the wire (hold onto the handle), hold a 1/4 inch to 1/2 inch away from engine and crank the engine. There should be a spark. If no spark you have a problem with either the ignition system or the ignition system control circuits. Generally if the computer dosen't see a crank signal you will not get a spark (if it doen't see a cam signal you won't get fuel). If no spark from wire try it on each wire. If not a single wire has spark, rent a scan tool from autozone or napa and see if there are any stored codes, also see if any codes come up while cranking. If you can't rent one you can buy a cheap one for under 30-40 dollars. If no codes and no spark the only thing you will have left to try is replacing the coil pack/s. If after replacing the coil packs you still don't have spark you will have to take it into a shop to have it checked out. The reason you would need to take it into a shop is because they will need to plug in a very expensive scan tool(1000-5000 dollars) that will show them all the sensor inputs. Hope this gets you up and running.
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: 2001 Jeep Cherokee - Cranks won't start - Gas gauge "E" w/gas
Disconnect and replace fuel filter.With filter disconnected have someone momentarily turn key to on position to see is fuel pump is working.Make sure you have lots of rags,a drain pan and safety goggles on
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