Scrapiron7

After changing out my plugs and driving my car for the first time since late October, I noticed something different.

During start up I get about 10-15 seconds of light smoke. Once warmed up, my idle jumps between 500 and 800 RPMs and the vacuum jumps around between 9-14 Hg and it feels like it's going to kill. If I rev it up to 1100 RPM my vacuum remains constant at 16 Hg. There is definitely not any power loss which makes me think it's just a vacuum leak somewhere. Over this winter I put in a Greddy Pulley kit and elimated the Airpump which may be a contributing factor to this weird problem. (Planning to get a PFC to get the fuel mixture straightened out)

I did check the Map sensor and it's tightly connected.

Just wondering if people think it's a leaky hose somewhere or if it's a sign of something worse. Let me know what you guys think. I want some ideas/opinions before I take it in for a compression check or a hose job. BTW the car has 51k miles on the original engine. Mods are below.

93redFD

it could be the fuel pressure, my car idled between 500 and 1200 rpms and I was told that it could be the fuel pressure.

93redFD

I didnt have a fuel pressure guage so i was going to borrow brain@bnr's and on my way there a coolent seal or water seal blew and the motor is being rebiult as of now.
My car smoked really bad after idling for maybe 10-15 seconds, the motor had 4k miles on it. Good luck.
Im not saying that was the problem or anything, i just dont know if it was the fuel pressure or what.