2001 grande cherokee will not start

HI GUY I HAVE A PROBLEM WITH 2OO1 JEEP IT HAVE NO CODE BUT IT WILL NOT START I CAN SEE FIRE COMING FROM THE THROTTLE BODY WHEN CRANKING IT {, IS THAT NORMAL FOR THESE JEEP ?
I HAVE CHANGE THE CAM SENSOR TOP BUT HAVEN DID ANY THING WITH CRANK CAUSE I AM GETTING SPARK AND I AND SEEING SIG, GROUND ,VOLT
IT HAVING GAS I ALSO TAKE OUT THE PLUG AND SEE WETNESS SOME DIRECTION WILL HELP

Have you checked the timing?

nope i did not check so far
but i did put the timing mark out side that i can see
do i have go further to the timing change
first let me say that i am diy so i will likte the procedure so i can start

Welcome to the forum!
I'm with Steve about wanting to check the timing.
A couple assumptions, I'm thinking you have a 4.0l 6cyl engine in this jeep? Because you say you've changed the cam sensor top makes me think it must be the 4.0l
I'm also assuming that you have a lab scope or graphing meter of some sort? You said you could see the power ground and signal at the cam sensor.
If you do have a scope, and a 4.0 litre engine, this video should help get you going:


This may be a long shot, but is there any chance the wrong coil has been installed? I've seen it more than once...
The 99 ignition coil looks the same, and even plugs in (the plug is at a different angle, but it still goes).
With that coil on a 2001 engine, the engine will back fire and kick back like an old distributor V8 with the plug wires mixed up.

this is grand Cherokee wj Laredo 4wd 4.0l with c.o.p no distributor what it have on is a new cop according the owner it will start with the old coil

Yeah, sounds like you have the wrong ignition coil installed.

Holy crap, it sounds like Noah hit this one on the nose :ohmy:

Did the pin assignments change between years? Just wondering how you'd go about figuring that out if you didn't know the interchangeability issue...

guy do have a WONDERFUL CHRISTMAS and thank to all who contributor to helping but it turn out to be the coil-pack but the problem that it start when i use the old c.-.p and it run but did not start again but it trying to
so i will look for code and see where i can go from there and i try to accelerate it back fire look for some more fix