so i got a 2000 jeep cherokee sport when i got it it was missing in cylinder 2 and 3 i was told it needed a coil pack so i got a new coil pack and spark plugs ngk plugs i have checked the injectors there all working i don't burn oil or coolant so i got a new crankshaft position sensor installed today and the check engine came back on after 5 miles and the exhaust is poping which it never did before also the check engine is on but it dont seem to be misfiring or acting weird aside from the poping from the exhaust i do have an exhaust leak if it matters i have the 4.0 if anyone has a clue please let me know!

 

Run-on posts like that hurt my head so badly, I tend not to bother with them.

 

Sounds like an awful lot of poping going on there. Your exhaust is Catholic?

Somewhere in the middle of that mess you said you have a check engine light. Take your papal Jeep to your local auto parts store (O'Reilly, Advance, Autozone, etc.) and ask them to scan the codes for you. Write down the numbers you get. ALL of the numbers. Then say three Hail Marys and confess the code numbers back here for people to have a better idea what's going on.