96 cherokee key starts car but when you let go of key car stops

2008 Jeep Grand Cherokee what cause the starter to keep on turning after i take my hand of the key? not told does engine run,.. wow. and if did run was starter screaming and grinding in pain, load and nasty sounds.
my guess it did not start the engine but im only guessing.

HAVE THE SAME CAR 2010 AND FULL OEM FACTORY 7000 PAGE SERVICE MANUAL IN IT.

ONLY 3 CAUSES OF ST LINE FAILURE HERE.
DO HAVE THE KEYLESS OPTION?
as in no dash slot to hold the fack key like mine has.
i will not guess 1 cause. will do all.
1; battery is super low now. and causes BCM to go mad. ( i cant hear your starter and hearing matters for 100 points here)
2; starter bad it can in fact stick (jam) or half stick and starter sings super high rpm but not the cranks shaft at all
3 the keyswitch is bad, stuck in ST position failed.
4: starter relay is bad as in contacts inside it welded (called fused)
5: if keyless option? dash has no key slot
6: added remote start box to car? as in remote cranking and starting?

we can see the car and all options on the car. day1 , or added later.


mine has this.
but mine has no remote start.
this yours.
this plugs into dash slot and there is a real key switch there.
when turned off the starter must stop, and engine.
if the starter keeps going , see my list.
for sure charge the cars battery 100 % first and now to do testing
not told engine runs.!!!

Could be a problem with the key switch or a relay. You can check the ignition and fuel pump circuits with a meter and see if you are loosing power from the key switch when you let go of the key.

starter bendix is stuck need a new starter or rebuild starter with new bendix

It sounds like you do have a relay problem try switching relays around that have the same part number start with the starter relay when switching the make sure the key is off each time

I don't quite understand what you mean by be held on. Normally you "hold on" to the key to start it and let it go back to the on position. If you have to hold the key on (start position) then you can might not be starting. The starter is turning the engine, but the engine not running? What happens when you give it gas?

try the ignition switch.. i am not sure try turning the key and keeping it in the turn over position... if it runs it is the ignition switch probably.. it means it is running of your starter.. you will have to hold the key there tho.. because it wont stay started if you dont hold it in the turn over... it can also mean key and tumbler... do you have gas in it??

check fuses in power distribution center near battery and auto shutdown relay

I might try checking with the dealer for a recall on this one

The problem is either in the mechanism that pushes the rod that activates the ignition switch from the key lock cylinder, or the ignition switch is defective.

If you leave your ignition key in the normal running position and then slip underneath your car from the rear of the passenger's side front tire, you can slide forward to see the starter and it's solenoid on it's backside. If you take a screwdriver and short between the smaller, center screw on the solenoid and the upper, larger screw (or bolt) you should get a spark and the sound of the starter motor cranking over the engine. Explanation: The solenoid tends to get sticky after a while and becomes reluctant to go back to it's "at rest" position. After driving the car awhile it normally falls back into place.