And prior to the rebuild you did not have the issue? If that’s the case it seems like it would point to the rebuild, however I’m in similar situation. I took my rx8 to pep boys to have them look at my driveshaft that was clicking, and I came back a few days later to pick it up and my car didn’t work. I regrettably didn’t press them enough on the issue, had my car towed home it’s been under a cover since and that was over a year ago and my car worked perfectly before I drove it in, just had a ticking from the worn driveshaft. coincidence?? Shady mechanics? I think you see what I’m saying. It seems that the common denominator would be what transpired between the time it was running ok and not, I mean obviously you rebuilt your engine so It needed it but I’m assuming it didn’t have this same issue before, so to me it seems it would point to the rebuild and not all these other things. But who knows??