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Originally Posted by pmckechnie
I have read many post about adjusting the ALDA. Some give procedures that check for smoke at WOT and 4000RPM (like above post). Some say it has no effect after boost comes up and is adjusted for off the line power. Could someone help me understand which one or both are correct.
Thanks
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The adjustment of the ALDA affects fuel delivery at all points in the operating range with the exception of idle and maximum fuel. It will affect off the line power and it will affect power when the turbo begins to provide boost. It can't affect the power at full rack,
AFAIK, because of the full load adjustment limiting screw on the IP.
So, adjusting it is largely a matter of watching for excessive smoke at any point in the operating range. The smoke should also cause a drop in fuel economy. So, if you are watching the fuel economy, adjust the ALDA, incrementally, maybe 1/4 turn counterclockwise per adjustment, and see if the economy remains the same. When the economy drops, the turn it back 1/4 turn clockwise and leave it there.