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#1
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How it works - vacuum system on a 1982 380SL?
Folks
As my handle suggests I have more of a background in diesels than gas engines, and I am in sales by trade so all of my knowledge of engines - such as it is - has been picked up by reading bulletin boards like this. I did train as an electrical engineer and so have some basic logical thinking skills. I've successfully diagnosed and fixed problems with the climate control system and the cruise control on two different cards. I have been diagnosing the dreaded high idle when warm problem and believe my idle control valve is working properly. Folks have been pointing me towards the vac system as a possible issue but I do not understand how it works or how the vac system influences idle speed. It's hard to test a system you do not understand. If there is a post that explains the operation of the system I would much appreciate a pointer as searching vacuum produces just too many hits! |
#2
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Over on Benzworld, member Nobby started a thread to collect information on the vacuum systems of the various model SLs. It may help you understand things.
http://www.benzworld.org/forums/r-c107-sl-slc-class/1453268-107-vacuum-diagrams.html |
#3
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Quote:
It's a great thread for SLs
__________________
Strelnik Invest in America: Buy a Congressman! 1950 170SD 1951 Citroen 11BN 1953 Citroen 11BNF limo 1953 220a project 1959 180D 1960 190D 1960 Borgward Isabella TS 2dr 1983 240D daily driver 1983 380SL 1990 350SDL daily driver alt 3 x Citroen DS21M, down from 5 3 x Citroen 2CV, down from 6 |
#4
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You can spend a long time troubleshooting the system or you can very reasonably purchase a pile of rubber fittings and plastic tubing and replace it all.
A few hours is all it takes to replace virtually all the engine control lines and unless they've been replaced recently, they are all probably due. I opted for the latter after gently pushing aside a line and having it break on me. |
#5
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What a great thread - I've been looking for the door-lock vacuum drawing for ages
Cheers Jim
__________________
Keep your Motor runnin' Jim's '88 300SL |
#6
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What is your economy gage doing when the car is running, it should be pegged full left even at idle, if it's not you have a vacume leak, easy to check.
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