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Will98D Will98D is offline
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Join Date: Jul 2001
Location: Rochester, NY
Posts: 502
Question deceleration valve leaking?

1974 1.8, L-Jet FI: wondered why PO had idle air screw all the way in. I've replaced all hoses and Aux Air valve system is OK. So, last night I warmed it up and crimped off the deceleration valve air at idle, and the idle dropped from its usual 800 - 1,200 or so to about 600. Now I can do a fine adjustment of the idle air screw and have a steady 900rpm. Am I correct in thinking that the deceleration valve should only admit air for a few seconds after releasing the throttle from a higher rpm (the book says test by releasing the throttle from 3,000 and it should pull air through the valve)?
Old 11-02-2001, 04:46 AM
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