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#1
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280SL idle speed
Recently I have noticed the idle speed increases by 100-200 rpm when I release the brake pedal after waiting at a stop light in neutral. The car is a 4 speed manual. Is this normal, or does it indicate perhaps a vacuum leak or some other problem?
Steve Hamilton 1969 280SL Vancouver, BC |
#2
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That is not normal
Maybe a vacuum leak in the booster?
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#3
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Thanks for your help.
I removed the brake booster vacuum hose from the intake manifold, and plugged the hole with a rubber ball. The brakes no longer affect the idle speed. Does this mean I need a new brake booster? Is there another test I should do to confirm the booster is at fault? Are booster rebuild kits available for the 280SL? Steve |
#4
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Someone else may follow-up with a suggestion. But I see no other tests to perform: you need a brake booster. This could be rather expensive, so I suggest you make plenty of calls and shop for a price. And someone may have a rebuild kit, though I don't know of one myself.
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#5
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Vacuum booster on eBay
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1837232062&sspagename=ADME:B:SS:US:1
Seller has a feedback rating of zero. |
#6
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Thanks for the link. It looks a bit dicey considering the cosmetics and 0 feedback... I may have to spring for a new one.
Steve |
#7
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There are places in Hemmings that will rebuild brake boosters quite reasonably. It takes a week or so. I used one when I had a Porsche 928 and saved a bundle.
__________________
Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe |
#8
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You might try White Post Restorations, White Post, VA. 540-837-1140 or www.whitepost.com
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