So I took the computer from the parts xj i bought and swapped it into mine and now the engine will only run for a bout 3 seconds and it shuts down. I'm thinking this is probably because of the chip inside the key but i'm not 100% sure. anyone know if i'm on the right track?

 

Auto Shut Down. That is the anti-theft circuit built into the PCM. You may have to take it to the dealer for a flash program. There is no chip in the key.

 

I do beleive you are right with chip in key my 2000 has one as found out when went to get new key cut.

 

take the key to the dealer? or the truck itself?

 

Drive the key there in your Jeep, that way you'll have both there.

 

cant really drive the jeep there if it wont run for more than 5 seconds...

 

i take it you dont have a key for the parts jeep that u can use now??

 

yea i do have the key for it. it doesnt do much good tho kuz it wont turn in the ingnition of the good one.. so i'm thinkin i can either try to get that key cut to the same as my other key, or i need to swap the ignitions because driving it to the stealership isnt really an option at this point. unless there was a way to temporarily bypass the auto-shutdown i dont really see any other options.

these are just my ideas.. i dont know much about it so i may be over complicating things so any input is appreciated.