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Message: <blockquote data-quote="blackdemon007" data-source="post: 1200569" data-attributes="member: 18797">Hello guys,To start off this is my first post (glad to be a part of the community), sorry it has to be a problem, but maybe you can help me and hopefully I can help you all in the future.Anyway, let me give you some background info (sorry for the length but just trying to help)Car on stock tune:Had a real bad exhaust leak - ordered parts and took it to a shop for installation.On the way to the shop car started jerking (both while accelerating and cruising) on the interstate near my exit.Got off on the exit - car still jerking - then it died and wouldn't start, guys from the shop put it on a car dolly and took it to the shop.Came up the next day with my tuner (SCT X3) and pulled codes (P1000 - OBD Systems readiness test not complete)I cleared the codes and car started right up.Had the entire exhaust replaced with longtubes, new cats, 2.5" pipes into slp resonators, also a new egr tube and O2 Sensors.Picked up the car from the shop and during the drive home it was fine in the city.Got on the interstate and car started jerking again, got off on the next exit and car died.Had family bring my tuner up - cleared the codes (P1000 and P1260 - Theft Detected, Vehicle Immobilized) and installed my new tune for the exhaust - car turned over but wouldn't start back up - had it towed home.Installed new coils and plugs - car still wouldn't start and backfired while trying.Put the car back to the stock tune and car started - now no codes.Took it for a test drive, not real far just in case, and noticed car jerked every now and then but definitely not as bad and still no codes.Thinking possibly the MAF but not sure, any help would be appreciated.Thanks Everyone.</blockquote>