recently my xj has been running weird when in neutral or park i can rev it up fine but when in gear if i apply more than a quarter throttle it sputters and sometimes backfires almost shuts off and sometimes completely dies. I have put a new feul pump, tps sensor, sparkplugs, ignition coil pack but problem still occurs no engine lights anymore only code i had was for the tps sensor i have now replaced

 

Recently our 2001 was sputtering on startup. We had the ignition coil replaced with one from AutoZone. It got worse. We then replaced it with an original MOPAR part and no more sputtering.

 

thats what i did as well but it didnt change anything lol been out of riding for almost a month