If = your o2 sensor voltage is running 0.0 volts at full throttle I feel you could have a problem with fuel delivery. I would check = the fuel pressure or just change the fuel filter. You should run 30 = psi normally and 36 under full load conditions. Your and Marks = statements that the injectors are open nearly all the time at high rpm is true but there = seems to be enough duration for a proper mixture. My O2 sensor voltage runs around 0.75 volts at full throttle, even when = wound up tight. The digifant system will go out of closed loop = when at full throttle or the full throttle switch is transferred. Listee = Kay Fremgen from Orlando, who is turing South America at the present (hope = he and Valeria voted) has a push button on his parking brake cover that is in = parrallel with the full throttle switch. He can force open loop with = the push of a button. <= /FONT>

I have on accident = (forgot I had listee Bill Dummitt's ecu with an oz chip) pulled my van up to = near 6 k rpm. Never noticed it gasping for fuel or air. Luckily the rods are = still attached to the crank. &= nbsp;

----- Original Message -----

From: Gary Stearns

Sent: Monday, November 13, 2000 = 7:18 PM

Subject: Digifant performance stuff.

, I saw that on a high speed uphill with foot = on the floor the voltmeter dropped to 0.00; mixture drastically leaning = out. Got home still pondering this, checked e-mail and found that = Mark had written me about his finding that at wide open throttle (WOT) = the standard fuel pressure regulator can't keep up with what the = engine needs