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by RickyTerzis
Wed Aug 30, 2017 5:05 pm
Forum: Series 3
Topic: Thermostatic Vacuum Valve and Retard Unit
Replies: 23
Views: 16760
United States of America

Re: Thermostatic Vacuum Valve and Retard Unit

Hi...i am a new user here. As per my knowledge what you need to do is use your gauge to measure 1/ manifold vacuum at various throttle openings; 2/ ported vacuum at the place where the later ZS carbs had their EGR connected at various throttle openings and finally 3/ vacuum from the LH rear carburet...