I have some shockingly embarrassing news to report here...
Upon the original entry in this thread, I had just done the 100k mile tune up on this SL1.
......at 122k now, I did another MMO soak and when replacing the (broken) spark plug wires for the initial startup I realized something quite disturbing.
FOR 22k MILES I'VE BEEN RUNNING THE WRONG FIRING ORDER. DOH! lol
I wired the car 1-4-2-3 when it's acutally 4-1-2-3.
Upon this fix, the car runs INCREDIBLY SMOOTHER, go figure. Oddly enough though it feels more anemic than ever. Oh well, 100hp isn't much anyway!
The shade-tree-mechanic in me is grinning because although I drove 2 years on the wrong firing order, she's running better than I've ever experienced.
I hope the mileage goes up, been averaging 26-28 city for quite some time now. I'd like to see some 30's now w/ the firing order corrected.
haha