I have a 1990 Miata, with a swapped-in 1995 motor on the stock ECU, swap was done in May of '13. I put a timing light on the car shortly after the install and got everything to spec. The car runs well, with no issues, other than poor gas mpg (23/26), and blowing through oil. The only sign of leakage I see is on the tranny, but never enough to leave a puddle or spot. I have never heard pinging or felt underpowered.

I decided to put the timing light on back on the car tonight, and I can not get the timing notch into the plastic timing grid area. I rechecked that I was using the notch, and repainted both the notch and grid. The notch is at the 12:00 position on the pulley, and the CAS is twisted as far clockwise as I can get. The only way to go further would be to remove the adjustment bolt, i guess.

What could have happened to cause this, and how can I fix it? Would jumped timing be the cause? can the pulley slip out of place?

Any advice will be greatly appreciated.