Went for a ride today, new 02 location, o2 sensor read good all day. I Took my knock sensor off, probably bad timing as I'm sure I gave it some true detonation. I had a few times where the sled "fell on its face" I was watching the a/f and in those times it had zoomed off lean, Keep in mind previously my sled ran fine wide open, I could do a long pull having it pinned wide open and higher boost levels fine, it was in and out of the throttle.
Then after that A few times i noticed in boost while the fueling was OK, it had this weird stutter/bog, and I noticed when it did that, the af started to play around 12:1 then dart up for 1 split reading at 14:1..... hmm....
coming home the sled got worse when hitting the throttle and such,
So now I'm thinking, if I'm going lean in boost I'm not receiving fuel. Maybe my fuel pressure regulator? Probable fuel pump? It has a brand new fuel filter, Same model I've used before and never had an issue, It's over sized compared to stock ones. So I figure well, I may as well order up a fuel pump, Maybe I'll swap my fuel pressure regulator with a spare one I have off my yamaha I had (same one they use). I will check fuel pump FLOW and pressure as well but it seems from the past perhaps an intermittent problem as well.... so who knows,
What a head ache this sleds been for me :bowl: