Deceleration valve?

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Joe - 28 Mar 2005 19:03 GMT

I have a 1972 Ford Mustang, 351C, 4bbl, 4-speed manual. I need to
replace or reroute around the deceleration valve (a/k/a distributor
vacuum advance control valve). I can't find a replacement for it
anywhere. Does anyone know where to find a replacement or how to route
around the valve? It is used during deceleration to advance timing to
decrease backfiring.

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Big Al - 28 Mar 2005 23:50 GMT

>I have a 1972 Ford Mustang, 351C, 4bbl, 4-speed manual. I need to
> replace or reroute around the deceleration valve (a/k/a distributor
> vacuum advance control valve). I can't find a replacement for it
> anywhere. Does anyone know where to find a replacement or how to route
> around the valve? It is used during deceleration to advance timing to
> decrease backfiring.

It retards the timing on a 71?? You are talking about the dual diaphragm
distributor?

Al

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Joe - 29 Mar 2005 04:23 GMT

No. 1972. It retards the timing when you remove your foot from the
gas, supposedly to reduce NOx and prevent backfiring. It's also called
a Distributor Vacuum Advanced Contol. You can see it in Fig. 113 (as
number 15) by following this link.
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1
e/eb/84/0900823d801eeb84.jsp

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