I just checked my plenum today. My pressure tester registered about 60psi at rest that rapidly dropped to about 17psi. At idle it very rapidly flicks between about 55 and 60. I noticed that a small part of the passengers side of the plenum was clean, could this be from the seafoam I ran through it not too long ago?
The drivers side was all carboned up as usual.

I am getting P0172 system too rich bank 1
and P1406
I am in the process of getting a trombone cleaner to clean out my EGR passage (is there something that would be easier to get that would work to clean it out?)

I began getting P0172 after running seafoam through my intake to get rid of carbon build up and get the whitesmoke out of my exhaust. And at the last fill up i ran some Marvel though the gas to see if a plunger in my injector was sticking, no results yet.

My idle is rough, my exhaust is strong and smells like gas, and i keep failing emisions by a little bit. I've lost power, but I'm not convinced its my FPR, I'm still thinking it might be the spider. When i get a chance I'll take the the plenum cover off completely and not just the cap.

 

If your pressure is dropping that fast, you have a leak in the fuel system. I would be popping the upper plenum off sooner than later. You may not have a faulty FPR, but rather, maybe a failed nut kit...

 

http://www.dormanproducts.com/images/items/hwrap1/55163.jpg]Is This What You're Talking about? return hose[/URL]
or what exactly is a nut kit

 

Yes, that is what is commonly referred to as the 'nut kit'. It consists of the internal feed and return lines.

 

Would i test that by just taking the upper plenum off, and pressurizing the system, or is that a bad idea?

 

i was gonna say it was the nut kit also. i had the same problem

 

well i ordered the nutkit and FPR (just for good measure) for a grand total of about $100... and DAMN IT my CEL went off again(and no i don't mean it came on)..... i think it does it to spite me....

anyways.... i pick them up tomorrow and ill keep driving and see if they come back on... maybe the marvel mystery oil i put in mysteriously and marvelously fixed it

 

alright, my codes have stayed off for a day, and its running smoother and its got more power, and smells a little less gasoline-ish...

and i haven't even replaced anything yet.... im cursed

Ill be poppin off the upper plenum tomorrow and installing the new FPR and nut kit

 

Yah when you do those fixes you might want to clean your MAF sensor if you havent in a while to help save some gas, and maybe bring down the mixture toward lean.

 

'95s dont have them haha
and on the bright side, the codes came back and its rough again