Boostedmx606

Hello everyone. I may be new to this forum but i am no stranger to working on all sorts of random cool cars. I just recently decided to buy a 2005 Audi A4 3.0 from a friend who owns a dealership. He told me $6000 and the car is mine, no rust, no dents ect. However, the deal was is that i had to fix all the check engine lights in order to purchase the car. When i scanned it, it had about 7 check engine lights. I cleared the codes and stared it and it all came back again. Cylinder misfire 1-6 and multiple cylinder misfires. I went ahead and purchased 6 spark plugs and 6 coils along with a MAF sensor. I installed all of them, cleared the codes and started it up... no check engine lights. Drove around the block, no check engine lights. Drove 15 miles and still no CEL however i hooked up to my scanner and had 3 misfire codes pending. I cleared them, drove the car for 35 miles, all but 1 monitor was ready and i got it inspected.... I thought everything was great. Next day, i started it back up and it threw a CEL light and 7 codes popped up again, all for cylinder misfires. At this point, i dont want to pull the parts shotgun out and start replacing every sensor but i have no idea what to do now. Please, does anyone have any idea on what is going on. New plugs, coils and MAF and same problem. PS. i this car runs and drives great, there is no actualy noticeable misfires, it doesnt hesistate, pop, spit, sputter or anything. i never actually witnessed a misfire. I just cleared the codes and drove 25 miles and still no cel. Ugh

gilram01

have you checked for any wiring harness issues? rat damage or deterioration