amazingly powerful vehicles with the alda off aren't they... congratulations! the problem with it off is all the black smoke and the speeding tickets. with fuel prices creeping higher and higher, I'd hook it back up, after the line is confirmed clean... I might open her up a 1/4 turn though.

I think all the turbo diesels have the obp valve... the line that's going to the other place should be going to the flying blue saucer... and it's job is to boost vacuum signal to the transmission for shift stability. I'll check my parts car 93 to be sure...
I would not test the alda, I'd test the pressure line feeding the alda to be CERTAIN it's totally clear of gunk. you have a boost gauge, if you are going to drive without the alda, you shoud invest in a pyrometer.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!