Its a 90 Shadow Es Vnt (2.2 turbo IV).
At idle it feels like I have a misfire up to about 2000 rpm and then its fine. I don't feel it when I accelerate, or decelerate. While staying at a consistant rpm (like around 2000rpm) I can feel it but not as bad as when it is at idle. I pulled my spark plugs and all the gaps are good, no carbon build up. Did a compression check (155,150,145,145) and that seems fine. I checked and have no codes. My fuel pressure is 50psi if I just turn the key on, and 50psi when running. I rarely if ever drive it above 4000rpm. Its only done this the last two days or so which in northern IL we just had a warm snap (went from 30 to 70 degrees out) and wondering if that has something to do with it like a bad baro sensor. I also swapped in another hall effect pick-up just incase. I also heard about the distributor drive gear to the intermediate shaft sometimes strips out. I didn't have time to check that though. Just seeing if anyone has seen this before, or might know something else to check.