Re: CIS fuel distributor disassembly and findings - Saab 900 Bulletin Board - Saabnet.com
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Re: CIS fuel distributor disassembly and findings
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Posted by Saana88 [Email] (#207) [Profile/Gallery] (more from Saana88) on Fri, 8 Feb 2008 15:14:43 Share Post by Email
In Reply to: 8 valve cis fuel distributor disassembly and findings, saab86, Thu, 7 Feb 2008 13:55:45
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First of all, thank you for posting this. It's one of the little crooks and nannies I actually haven't pulled apart yet on my '88. I'm kind of dreading the occasion, but it's going to happen.
Second, my family's experience to date has been that these will usually last around 120k before they start to gunk up and the o-rings start to "Pull a Challenger."
I've seen the diagrams and read the literature explaining basically how this thing works, but I've never seen the guts of it. The principles are pretty even- full pressure on one side, something (return spring versus vacuum, bimetallic spring versus heating element, et cetera) held in check by something else (rest pressure, control pressure, line pressure, et cetera).
And finally, it's worth saying that these cars were built for educated customers (not "consumers") who wouldn't tolerate the thought of having a whole hodgepodge of disposable/throwaway/nonrebuildable parts on a car. The problem with them became availability. My sister's first car (a Brazilian-built '88 VW Fox, affectionately "der scheistwagen") needed a steady diet (like one per tank) of Techron and drygas to keep things moving in there, and spares were impossible to find. Eventually the o-rings leaked more and more and the car ran richer and richer and eventually they sold it.

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