Quote:
Originally Posted by AlexTheSeal
Is one full turn a slight tweak? I thought maybe the notches into which the T-handle in the modulator fits were there to indicate the preferred tweak interval.
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Try a half-turn at a time. "Slight" is one or two notches.
If you go too firm at WOT, all the part throttle shifts will firm up also, which you don't want.
Quote:
Originally Posted by AlexTheSeal
OK... how do I know that they are not plugged and/or leaking? Apply vacuum with the MityVac to the vacuum inputs on the one? See if the other passes pressure through when energized or vice versa? I'm at a loss. Do they act more like relays (on/off) or more like transistors (sensitive to variable voltage or resistance?
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Basically you need to blow through each tube and make sure it's clear. Or just replace every single one... the old Tecalan tubes get brittle with heat, and they're cheap. You can replace everything with fresh tubing for about $20, it's a few bucks per meter.
The switchover valves are basically relays, they are on or off. A plunger inside moves up & down. I believe the center port is routed to the bottom with no voltage, and routed to the top with voltage applied. You should be able to easily blow through them. If they're plugged, they can be very hard to clean out, they can't be taken apart. Usually the only one that gets clogged is the one between the manifold and the ALDA, it can get plugged with oily sooty goop from the intake.
