Quote Originally Posted by Fivefingerdeathpunch View Post
If it ran better unplugged, then it could be the whole issue.

But a smoke test fill all the vacuum hoses and whole motor with smoke and if any comes out of spaces that would suck in air like a gasket or vacuum line, then you know you have a leak.
how would i do a smoke test. i dont have anything that can make smoke like that?

I also have a 165 tstat, that i am pretty sure was never tuned for (i know the motor richens the fuel trim when in warm up. IDK if this shows up on the LTFT. My monte had an abnormally high LTFT as well, i wonder if its something environmental