Jim - Thanks for the response again. I will check the timing and get back to you. When I intially Timed the Jeep w/ the DUI Ignition, Weber card, no cat or emmsions, etc. I could not get the engine to run smooth at the suggested timing it was all over the place. By adjusting it slightly a few degrees in my opionion, it has ran great for 1500 miles. I don't know why that would change all of the sudden and what would account for the sputtering and poppping, rough running? It feels like its not running on all 6 cyl. An ideas? I will check the timing and get back to you. Thanks again.