HomemadeTurbo - DIY Turbo Forum - LEAN!! Car Goes Lean @ 4000+ RPM, TE Fuel Adj Not Working!!

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LEAN!! Car Goes Lean @ 4000+ RPM, TE Fuel Adj Not Working!!

I thought I found the culprit to this problem earlier last week when I swapped out my adjustable B&M FPR.
Took me a while to get the car running flawless and perfect under vacuum and today I tried some boost tuning. Did a run that should have been nice and rich and the air fuels just climb rapidly after 3800 or so rpm
The motor is a d16a6, forged pistons and rods and a lot of headwork. T3 .60/.63 turbo pushing 15psi. DSm 450cc injectors, new walbro high flow pump, gm 3 bar

I figured I was maxing the injectors out and then I turned down the boost to about 7psi, went for a run and right at about 3800-4000 rpm again (4th gear) the air fuel on the wideband just started rising again. They hit 13:1 and I cut it

The fuel cells in TE are maxed 20.62 in boost, the air fuels still skyrocket

What could possibly be the problem?

Re: LEAN!! Car Goes Lean @ 4000+ RPM, TE Fuel Adj Not Working!!

you have plenty of room to add fuel from 7 to 15 psi, you only have it maxed out at 17+ psi......just keep playing with it, a lot of times changing the fuel correction % will aid you a great deal in boost tuning....