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Ignition Vacuum Delay Valve? 200 1981

posted by  81242DLB21FCA on  Tue Aug 5 16:33 CST 2014
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last visit: Thu Oct 23 22:26 CST 2014
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1981 B21F 242DL
non-turbo
Calif version emissions
AW70
Owned since '86
306k miles

Is there suppose to be a vacuum delay valve in the distributor vacuum advance line? My car has always jerked rather than accelerated smoothly from a stop. It's not exactly neck snapping but the take off is a sudden jerk no matter how slowly I open the throttle.


A timing light shows a sudden large advance with just a small throttle opening. Engine and trans seem smooth otherwise. DS u-joints and bearing have been replaced and car gets good maintenance by me exclusively.

Any recommendations if I wanted to try one?






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