High Idle, running super rich... any help appreciated

[Kujo II]

Hey guys, so I'm posting to get some feedback mainly to validate my theory more than anything, so here goes...

'90 N/A 5-speed

Idles High (1200-1400RPM)I checked everything in the world on this one, cleaned aac, adjusted, etc. Does not idle down even with adjustment screw all the way in and aac unplugged.

Misses on driver's side second cylinder when cold

Runs really really rich, can stink you out of the garage in 30 seconds flat. After I drove it on the highway for a while it seemed better, I figure it finally managed to clear the cylinder

No DTC's

Gets about 12 mpg highway

and now for the kicker-

its got gas in the oil.

I'm thinking its got a bad injector in the cylinder it misses on, but if I'm gonna tear the whole thing apart, I figured it's a good time to get them all.

Thoughts? alternate theories?

[Onyxblue]

Any ECU codes?Is the TPS at 0.44V?Is the water temperature working? Checked its resistance?I would suggest a balance test.

As for gas in the oil, this is bad - injector stuck open or O-ring pinched.

[Kujo II]

No codes, I just changed the coolant temp sensor this morning, I haven't checked the throttle position sensor yet. I agree on the gas/oil thing, although I don't know what you mean when you say "balance test..."

[Kujo II]

bump