i was instructed to replace a engine in a 94 740i, but when i got in it it ran like a top. i was told that the dealer said the 141k mile nic motor was bad but i thought it ran way to good to be crap, i did a leak down on it after the motor warmed up for about 5 minutes and the worst hole was 13%. when it came to the yard a few weeks ago (long term project) the boss moved it around and said it ran like ****, i get into it with a stone dead battery and jump it and it runs fine, my guess is it has one of the common m60 intake problems that pissed off the computer settings and the reset did it good (i've seen it before on v8s), is there something special that i am missing on the leak down test? or did the dealer goober blow it? i am guessing a plugged cat and or a intake leak gave the computer a fit and had it running bad, we had a e38 740 that had a leak and a plugged cat and that drove it nuts, the computer was adjusting the mixture 50% lean on one bank and 50% rich on the other, it wouldn't get out of it's own way but if you unplugged the computer it would do ok for 5-10 minutes. this women is ready to pay for a motor job, i think she's been talked into the nic motor is a time bomb, i just don't think it's bad, i am getting covert pressure from the office to sell the job what ya think?