xj 99- will run fine for days , then you will drive and it will stall out while dirving. jeep will not start in neutral, however it does have reverse lights. 90% of the time no check engine light , has come on and got code po700 and po705 , took too a shop had for 4 days problem did not stall out once. any ideas.

 

Sounds like your catalytic converter. As far as starting in neutral.. Thats gotta be something with the neutral safety switch. Ive been having problems out of mine as well, i just wiggle my shifter and it does the trick for me. Im thinking the honey comb in your cat might be getting turned sideways or even it night be clogged and creating too much back pressure, first check your grounds clean them all even on the block.

 

thanks i will take a look at that