Hello i just bought my first car back 90ls teg. I sold it 9 years ago and bought it back swapped and lightly modified. My problem is he did a b17a1 swap and it is running like ass. Sounds like it is missing, and breaking up at high rpm. s2 intake manifold, header, exhaust, intake, and other mods were done. These few things and the motor alone should move this car reasonably well. but it is slower than my friends 99 cavalier. would map sensor, timing, be an issue. It also puffs a little smoke after shifting. any help would be excellent.