2000 TJ 4L trouble getting to start ( STARTED)

[bdron]

I have just replaced the 4L engine in my 2000 TJ with 1 out of a 2002 and I am having problems getting it started. It back fires and smells like fuel but does not  start. I used all the sensors from the old 4L. Does anyone have any ideas of what to check next?

[mrjeep4]

Are all the spark plug wires in the right order ?      I've seen that happen before on a engine swap. 

[Vinman]

Are all the spark plug wires in the right order ?      I've seen that happen before on a engine swap. 

No spark plug wires on the 2000 and up TJ's

[Bnine]

Sounds like cam position sensor (distributer) may be out a tooth.

[bdron]

Sounds like cam position sensor (distributer) may be out a tooth.

I have found TDC and put a drill bit thought the cam position sensor and it lines up perfectly.

[Zombie]

all the sensors are plugged in??

a long shot, but I could see it happening, I have even done that when I unplugged 2 things and forgot about one sensor that I could not really see that well.

[Evil-Jeep]

Just out of curiosity, did you ever see the newer motor running, and why did you use the old sensors?

[Bnine]

Still sounds out of time. You've got fuel, and spark according to your backfire.  If the rest of the sensors worked previously, they should be working now.

I would re-check the cam sensor. We've all been there when we thought we had TDC and still missed a tooth.

[Bnine]

And yeah, make sure you re check all the sensor connections, specially the crank.

You can pull the temp sensor to simulate -40 degrees c and throw the comp into open loop. Should poor fuel like crazy, ruling out fuel supply issues.

Test your fuel pressure............

Theres a lot you can do.

[bdron]

And yeah, make sure you re check all the sensor connections, specially the crank.

You can pull the temp sensor to simulate -40 degrees c and throw the comp into open loop. Should poor fuel like crazy, ruling out fuel supply issues.

Test your fuel pressure............

Theres a lot you can do.

Thank you for giving me some things to check. I don't have the pcm for the newer motor but I have tried both years sensors. The only thing that I haven't checked yet is the flywheel flex plate to see if they were the same. I have been told that they are different but I will check that this weekend. I will try the temp sensor first and the fuel pressure to see if that will work.
Thanks again
Brian