Interesting issue I cannot seem to figure out....

[Reptile]

Shawn, I tried calling you back, but left a message. Sorry I didn't get to you sooner on the issue. Pumps have been known to get weak over time, yes. Another issue to look at would possibly be the Pump Resistor if you have never touched that. It could be restricting the voltage to your fuel pump at WOT. I believe there is a mod to bypass it temporarily by bending a connector on the pump relay. Before you go to drastic actions, do a search on that and see if it fixes your problems at WOT.

On the fuel trims issue, + or - 3 at idle and cruise is deemed acceptable, but you always want your car to lock in at 0 at WOT. The car knows that something isn't right, so that's why it's trying to add fuel by possibly raising the IPW on the injectors.

Keep a cool head, and you'll find the problem!

HTH

[Iron Indian]

Shawn, I tried calling you back, but left a message. Sorry I didn't get to you sooner on the issue. Pumps have been known to get weak over time, yes. Another issue to look at would possibly be the Pump Resistor if you have never touched that. It could be restricting the voltage to your fuel pump at WOT. I believe there is a mod to bypass it temporarily by bending a connector on the pump relay. Before you go to drastic actions, do a search on that and see if it fixes your problems at WOT.

On the fuel trims issue, + or - 3 at idle and cruise is deemed acceptable, but you always want your car to lock in at 0 at WOT. The car knows that something isn't right, so that's why it's trying to add fuel by possibly raising the IPW on the injectors.

Keep a cool head, and you'll find the problem!

HTH

I was about to PM you to thank ya for calling me, i got your message. I was gonna call you back but i've been trying to juggle several things all day long.

As for the pump resistor, I have them bypassed on both GTPs, I have for years, they suck! LOL. Good thought though, I never even thought of mentioning that I had done that in the past! As for the mod, it bending tab 85 on the relay.

Hope to figure this out soon...