Broke down and bought a test gauge. Here are the results:

In the first 2-3 seconds, before the "click": 43psi
After that, KOEO: 36psi
Engine on: 36-38psi, fluctuating rapidly
Pulled vac line: 42-43psi fluctuating rapidly
Turn off: 28psi
Let car sit for about 10mins: pressure actually rose over 32psi

Didn't get a chance to take the car out for a WOT run. Truthfully I think the hose to the gauge might be too short to tape it to the windshield. I'll probably take this one back anyway, and if I need another one I'll order the Hypertech one.

Anyway, it doesn't appear that I'm running rich because of a leaky injector. The pressure did not drop after either the key or car was turned off, it actually went up. I also pulled the vac line and there was no fuel in it that I could see so I think the FPR is ok. However, based on these results what seems to be the most likely culprit for a rich condition? Any help is greatly appreciated. TIA.

 

Maybe an exhaust leak or bad o2.

 

Exhaust leak is the only thing I can think of. I have scanned the car numerous times and the 02's are fine.

I have listed the different results in this post:

StngStlkr Post

What I wanted to know though, and the reason I made this post, was if the results I got are normal. In other words, can I eliminate a problem in my fuel system as being the reason I'm running rich?

 

TTT

I plan on changing the plugs tomorrow. Other than exhaust leaks what else should I pay attention to?

 

Intrested to know how it comes out, i'm having the same problem in my 97.

 

Swapped plugs, and have a ton of pics of the old ones. Here they are for your viewing pleasure. Please give me any insight after viewing them. Some are clearer than others. Plug #1 is the closest to the nose of the car, plug #2 is next back, #3 next back, #4 closest to the firewall.

Driver Side 1a
Driver Side 1b

Driver Side 2a
Driver Side 2b

Driver Side 3a
Driver Side 3b

Driver Side 4a
Driver Side 4b

Pass Side 1a
Pass Side 1b

Pass Side 2a
Pass Side 2b

Pass Side 3a
Pass Side 3b

Pass Side 4a
Pass Side 4b

 

how's it running now with the new plugs?

 

It seems to be running a bit smoother, but on the scanner it looks like my injectors are still firing too much fuel. Left injectors at about 3.1-3.3mS and the right at about 2.8-3.0 mS.

I checked the connections where my y-pipe meets the exhaust manifolds and it appears to be tight. Though I'm guessing that even a small leak would throw things off. However, with both banks appearing to run rich I'm not sure the leak would be at the y-pipe. Guess I'll keep looking.

 

Put in a new PCV valve, still running rich. Showing both sides of injectors 2.8-3.3mS. I'm probably going to end up pulling the fuel rail and seeing what the injectors are doing. I'm still stumped.

Edit-In re-reading my Haynes manual I thought about the grounding for the fuel system. In the manual it says that it grounds at the intake manifold. Exactly where does it ground?