My Jeep wont start or turn over. it stalled one day and wouldnt start again. Seems coil wasnt getting spark

the 4.0L I-6 inline 6, over 5 million made. (owned 3 for 500k miles)
it can only be 3 things, bad engine,bad spark, bad fueling.
(and others, EGR stuck etc)
but you never stated the GOOD,just bad.
does IT Have full power up hills , if it does start.? hot or cold power?
a key fact,
and key fact 2? can you save the stall, with a fast right foot.?????
stalls 101:

1. never ever tuned up in decade. (most owners !)
2. stalls for bad spark ,see #1
3. stalls for lack of fuel, see #1 and new fuel filter.
4. EGR stuck open engine will stall. (some 4Ll have no EGR)
5. Lost fueling,
6. Flooding

there are simple tests to find it, my guessing is fruitless waste.

ALL day no starts.
cranks robustly does it (guess yes)
(lost spark, test for lost spark x6 (and at coil)
lost fueling, Spark trips dry test.
flooding, spark tips dripping in raw fuel, test.

so ever get a tune up,or just driving it till it drops dead, like most do.

remove coil wire at distributor and plug a HEI GM tester spark plug to see if spark at ignition coil if not test ignition coil for current and signal not short to ground

As with any no-start situation, you need to know if you have spark to the plugs, fuel to the injectors, and normal compression to proceed.

As with any no-start situation, someone will need to figure out if you are lacking fuel to the injectors or spark to the plugs.
You may also have a failed timing belt and no engine compression.

Did you check for spark? It sounds like you're not getting spark. Check for spark. If you are not getting spark then it sounds like you might have to replace the coil packs. Is it running a L4 engine? If its running a standard chevy L4 its probably the coil packs. Try to replace them check again for spark.

The first two things you need to do is check for gas and check for spark. Make sure that fuel is getting to the engine by checking the fuel pump, checking the fuel filter, the gas lines, and the injectors. If you engine is getting gas, then you need to make sure you are getting spark. Check the spark plugs/coils, wires, distributor, dist. cap, roter, cam sensor, crank sensor, timing belt. Anyone of these can be bad and cause your car to not start. Your best bet is trying to get a code from your computer. If you can't, just start checking them one by one.

That is going to be an ignition coil. That is what produces spark. But it could be the knock sensor or the cam sensor also. If they do not give the coil the signal to fire, then the coil will not spark.

Unlikely that it's a computer. Check your coil and the grounds, make sure you don't have any breaks in the wires that could cause an intermittent problem.

Crank position sensor, roughly about £50 from mercedes.
jib
www.mercanic.co.uk

check spark,injector pulse and fuel pressure when it wont start.