I may also pull the intake apart so I can clean it and check the injector seals.

 

Injector seals would make it run lean, so that's probably not an issue.
What is the TPS reading at idle?
You could try cleaning the throttle plate. Sometimes if you get enough carbon build up in there it can stick the throttle open a little bit. The computer sees an open throttle from the TPS and starts adding fuel, but it's actually closed against the deposits. You may have to remove it and really clean both sides good.

 

I just checked the throttle plate only finding a little oil residue, but no buildup or varnish.


I will let you know what the readings are after cranking it back up.


Do you think it's okay to crank it without the flywheel grommet?

 

As long as there's nothing in the way of the flywheel, I don't see why not.

 

Here are my readings:


intake temp: 76f start 96.8f after 10 mins


fuel trim: -1.6 - 0 at idle, both sides


maf: 6.1


vac: -10


o2: .1 and jumps to .8


coolant temp: 76f at start, 194f after 10 mins.

 

There's something up with the extra nipple below the oil separator line on the plenum.


When I plug it, she idles sort of normal. When I remove the plug she starts bogging down and will stall if I don't hit the throttle.

 

Which fuel trim reading is that? Check the long term and short term fuel trims. They should both be within +/- 10%. Anything over that and there is a problem.
On the MAF sensor reading, try doing a couple snap throttle tests. Open the throttle all the way and quickly release. The reading should spike briefly.

 

I'm not sure exactly what this is. Is it missing a plug, or a vacuum line?

 

There's a small nipple below the oil separator line and the vacuum line with the red quick release on the top passenger side of the plenum.
It's been like that since I bought it. I made a plug out of electric tape to seal it. I've asked on forums before what it goes to, and no one knows. It's a 99 model D2.

 

I don't know if mine has that. The '99 is different from mine, I think.