Ok I have a 96xj that I swapped in a 98 wrangler engine into. It's starts and idles fine but when you go to give it gas it starts to misfire and pop. I have pulled the distributor and re-verified timing and gone threw and wire brushed all the grounds. I swapped out the cps this morning with no change. It appears to be running rich because the manifold gets extremely hot very fast.

 

MAP secure?

Manifold could be getting hot from running lean or backfiring into the intake. Not rich

 

I double checked map again it is secure and It's poping back threw the intake and exhaust

 

Try these:

https://www.cherokeeforum.com/f51/cr...7/#post2114727
http://www.angelfire.com/my/fan/dist_index.html

https://www.cherokeeforum.com/f2/map...rocedure-7416/

 

Ok I'll test the map I double checked timing yesterday and verified the rotor pointed at #1 at tdc