So I drove my S13 SR20'd S14 to Orlando and back this weekend. The car drove awesome the entire way there. Good gas mileage, ran like a champ. New motor works great. No smoking, ran absolutely perfectly.
THEN. I start it up this morning to come into work, and it starts hesitating on partial throttle. Pulls like it should when it's on boost, and it feels fine while accelerating, but while crusing its bucking and shaking pretty badly. It also doesn't want to idle, but only sometimes. Some of the lights I stopped at it was pulling ~16-18 in/hg of vaccum at 1000rpm, but at other lights I was pulling 5 in/hg and it was trying to shut off (like 500rpm). Really odd.
Any suggestions of what I should check? Did a quick look around the engine bay, and all my t-bolt clamps seem tight on the couplers, and there's no obvious boost leaks, but that's sorta what it feels like. Except it runs great under acceleration... Someone help!
