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403 vacuum schematic [message #141539]

Mon, 29 August 2011 13:02

MikeT

Messages: 225
Registered: November 2009
Location: Marine City, Michigan

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Senior Member

I'm trying to get the cruise control to work on the 403 engine but the PO removed most of the vacuum hoses. I looked at the 455 vacuum hose connections on the other coach but they are different. I need to know where the two hoses from the cruise control module connect to the carb area and also the larger hose that connects to the rear of the diaphragm. Where does it originates and where does it terminates. Also, if there are any T fittings.

A simple hand drawing of the 403 engine vacuum schematic that I could see and maybe put mine back together would be of great help?

PS: This was a California coach at one time. Looks like the PO changed the intake manifold and never replaced all the vacuum hoses. This may also solve the intermittent idling problem I have.

Thanks

After more digging on the photo site I found these pictures. I think I am missing some parts. The two cylinder looking things. Anyone know if these are still available anywhere?

http://www.gmcmhphotos.com/photos/showphoto.php?photo=21820&title=detail-of-the-vaccum-and-wiring-2c-front-left-portion-of-engine&cat=4807

Mike Thomas Marine City, MI 77 ex Palm Beach

[Updated on: Mon, 29 August 2011 14:12]

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		403 vacuum schematic By: MikeT on Mon, 29 August 2011 13:02
		Re: 403 vacuum schematic By: spiffycar on Mon, 29 August 2011 15:10

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