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Re: How to check vacume advance to see if working on 85 900s? Posted by jak [Email] (#195) [Profile/Gallery] (more from jak) on Sun, 10 Dec 2000 13:42:54 In Reply to: How to check vacume advance to see if working on 85 900s?, AARAN RENWICK, Sun, 10 Dec 2000 13:22:26 Members do not see ads below this line. - Help Keep This Site Online - Signup |
your mouth should be strong enough to move the vac adv pull the dist cap off than the rotor & the black plastic cover while sucking on the line observe the advance lincage comeing into the dist ataching to the adv plate this lincage arm should rotate the plate when vac is aplied & return when released if not either you arent sucking hard enough or something is stuck also make sure the diaphram dosent leak if you can continually draw air through the hose either there is a hole in the hose or the diaphram is a leaker also I believe but am not positive there is a sentrifugal adv as well to check that put the rotor on grab onto it & rotate it I believe clockwise it should move a bit than spring back to its original position if all this checks out than set your timing as per underhood emissions sticker
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