o2 readings with TT chip?

[gn87turbo]

Okay, I currently have Eric's 93 chip in the car and I'm having some problems getting my o2 volts in the 750-800 range at WOT. Fuel pressure is set to 43 vacum off. So my question is should I add more fuel with the chip or turn up the pressure on my regulator? I added some fuel with the chip and it did seem to help some. o2 volts are currently staying around 650-700. Thanks.
Patrick

 

[Eric Stage I]

Typically the adjustment should be done using the chip adjustment. With your setup and chip, you will only be able to add about 10% more fuel before the injectors are maxed. I suspect there is something else wrong though, as there should be plenty of fuel there for a TE44/stock headed car. How much boost are you running?

Eric

 

[gn87turbo]

Eric, currently I have some turbo blue 110 in the car and I'm running about 21 lbs. My o2's will occasionally hit the 750-800 range but I can't get them to stay there consistantly. If I have 5 WOT runs in 3rd gear, one of them will get up in the target range. I have a new 108 chip I purchased from you last year that I plan on using this weekend at the track if I can get things worked out and my car not running so lean. My fuel pump is a new Walbro purchased from a board member last year. My o2 sensor is heated but could it be time to change it?

Thanks,
Patrick

 

[Eric Stage I]

I would try the O2 sensor first. If that's not it, then check fuel pressure under boost. It may be a fuel pump problem (even if the pump is new).