Why is my engine not firing?

Were you able to start it after unlocking the passenger door? Normally it is the driver door that controls the anti-theft systems on vehicles. Did you use the remote or a key? When you turn the key to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds?

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.

The remote no longer works and no I was unable to start the vehicle after the alarm was disabled.

The lock cylinder on the driver side is damaged and I am unable to lock or unlock the door with my key.

See if you can get it scanned for trouble codes. Soft and hard. Anti-theft system schematic attached.

Ignition failure with fifteen to thirty minutes. I wait to restart and increasing frequency of failure. Now I have no spark; no restart and after idiot lights go off ,when key is turned on, and I he check gauges. alarm sounds the voltmeter drops to zero ; however there is full power everywhere.

try resetting security system on car I think on yours it is lock drivers door with key then unlock. See link.
https://www.2carpros.com/articles/how-to-reset-a-security-system

96 grand cherokee laredo 4.0 2wd with 211k miles. since buying this vehicle a few months ago it has died on me about once a day when it gets up to temp. it wont start again from a few seconds to 10 mins or more. then it will run fine until it gets cold again. it dies like it had the key turned off, just instant off. sometimes it sounds like its dieseling after the engine cuts out before it dies out completely. will do it at high rpms but mostly happens when coming to a stop or at a stoplight while idling. usually has a window of this happening, anywhere from it happening once and being fine for rest of day(with generally no more than 2 hours being turned off) to it both not starting and starting and dying a few seconds later for about ten minutes or more. had a code for bad coil. replaced it, still have problem, and seems to have gotten worse since changing coil or due to lower outside temps happening at same time. mechanics were saying the coil that was replaced wasn't getting a spark while it wasn't starting. they want to try crank position sensor next. but after hearing them wondering what was wrong without a code, i lost my faith in their diagnosing skills. it has also started backfiring lately, just a couple times.

When it won't start, have you checked for spark and fuel to the engine?

No spark to coil that was replaced. Gets fuel.

The crank sensor could be an issue. However, it becomes a guessing game without the CEL.

Engine started one morning and stayed running for about 5 to 7 seconds, then the engine shutoff completely. Tried starting the car again. Will not turn on. Tried changing the ignition coil the car still does not turn on. asked around and heard i might need a new PCM but i dont want to change it until i know its not anything else.

Have you checked fuel pump pressure? Are you getting a good hot blue snapping spark at the plugs? Has the check engine light come on?

fuel pump is workin properly...no spark at the plugs, thats why i changed the ignition coil... no check engine light.

Is the power to the coil? Have you checked the crank sensor?

Have not checked the crank sensor... there is power to the coil.

There is power to the coil... have not checked the crank sensor.

My 1996 Jeep grand Cherokee stalled at a stop sign. Tried to start it back up and it wont start. It turns over but it will not fire. It was running good yesterday.

I would check the crank position sensor it on the back of the block. What engine is does it have?

Its a v8. 5.0

So its the 5.2 ltr 318? Do you have a digital multi meter so I walk you through some tests?

1996 Jeep Grand Cherokee 6 cyl Four Wheel Drive Automatic

I have a Jeep grand cherokee and I just changed the fuel filter and the fuel pump. When I start the car it starts and after about 30 sec it will die it wont stay started. The fuel pump goes on, but the Jeep wont stay started. If i rev the engine when I start it it will stay started once I let go of the gas pedal it will die it wont idle. Please help me I have to take the children to school on monday. Thank you!

Inspect and test the idle air control motor, EGR valve and throttle position and manifold absolute pressure sensor-

I had a similar idle problem a while ago and I fixed it by resetting the computer. Unplugging the negative battery cable for a few seconds resets it. Worth a shot anyway...it's easy to do.

someone put water in my gas tank and naow my car wont start what can i do. i know i have to take the water out but how and do i need to replace anithing. will my car ever start?

First thing you need to do is to drain the gas tank and put in new gas. Flushing of fuel tank is recommended. Next would be to purge the fuel system and you should be good to go. Replacement of the fuel filter is recommended but don't do it until you have purged the system.
At bottom of fuel tank there is a drain plug. Release the drain plug to drain out the water.
At fuel rail in engine compartment, disconnect it and put hose into a container to collect fuel that comes out. You can either cycle the ignition switch on/off for 2 second intervals to use the fuel pump to purge the lines or manually activate the fuel pump by means of applying battery voltage to it. Once fuel stops coming out of the lines, reinstall fuel lines and you can top up with new gas and try starting.

Might take a while of cranking to get it going.

Hi, my girlfriend tried jumping our 1996 Jeep Grand Cherokee Limited and put the cables on backwards and she said it
sparked really big.lol She then corrected it and tried to start it. The jeep starts but wont stay on unless you keep the cables attached
and keep giving it gas. Wont idle, just dies.

you'll have to check your maxi fuses to see if one is blown, it may have shorted soemthing else out as well, have it checked out and explain when you take it in what happened.

My vehicle listed above Zj cranks but wont start. the low fuel light stays on but i already changed the fuel pump and filter still no fix. I also changed the spark plugs/wires and still no start. any idea what it could be??

Hi,

Chances are it is either a fuel or ignition related issue. Try this. See if it starts for a couple seconds and then stalls. If it does, then we know it is fuel related. If it still doesn't start, then you need to check for spark to the plugs.

Here is a link you may find helpful:

https://www.2carpros.com/articles/car-cranks-but-wont-start

Try what I suggested and let me know the results.

Take care,
Joe