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Somatic Negative Optimist
Join Date: Mar 2002
Location: Winlaw, BC, Canada
Posts: 7,206
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I suggest that you put this question, with pic, as a seperate thread on the board if you get no answer. The sc's have different WUR's for '78-'79, 1980 stands alone, and '81-'83 has a different one again. On my '80, the vacuum line isn't even connected to anything and the WUR works fine. I noticed the same adjustment screw on the inside and assume that it is for calibration. Good luck.
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1980 Carrerarized SC with SS 3.2, LSD & Extras. SOLD!
1995 seafoam-green 993 C2, LSD, Sport seats. 
Abstract Darwin Ipso Facto: "Life is evolutionary random and has no meaning as evidenced by 7 Billion paranoid talking monkeys with super-inflated egos and matching vanity worshipping illusionary Gods and Saviors ". 
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