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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,616
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I'm thinking bad decel valve too. Disconnect and bypass it to see if that makes a difference. I'm not sure whether your 1983 has the adjustable type decel valve (those have a setscrew and locknut on the top). If so, try adjusting it.
On my 1980 RoW engine, I just removed it.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
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