O2 codes at open loop?

[Dark_5.0]

Originally posted by Nixon1
Lack of switching? As in, lack of switching to or from open to closed loop??

As far as engine oil goes....I changed it about 500 miles ago. Had small metal particles on my magnetic drain plug, but nothing major. My engine tore up some pushrods real bad a little while back so I got the drain plugs and all cause I couldn't do a tear-down and complete flush.

The PCV valve is around a year old or so...it SHOULDNT have any problems! Although I hesitate to throw around the word 'shouldnt'. And also, Ive had my PCV return system disabled for about a month now....I would imagine it would start showing these problems much sooner, instead of waiting so long, unless somehow I damaged something. Which I don't even see how I could. But I don't know, I'm lost.

Fuel psi, I mentioned in my enormous writeup...lol. 42 at idle, sometimes when I rev it'll spike up like it should, othertimes it'll dip. Maybe my fuel pump is having problems? Sometimes on an initial prime, it'll only build 15 or 20 psi...but after it's been primed a few times, it'll consistently build full pressure.

If what you say about your fuel pressure is true then the fuel pump is most definitely your problem.

Change that sucker out and you should be good to go. Takes about 2 hours if you take your time.

Piece of cake.