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#16
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Sounds like....
a vacuum problem at idle. Have you tested vacuum?
Should be at least 15-16 psi at idle. The intake manifold is a source, if you can get a vacuum gauge hose there (my 280S has one)
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old |
#17
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Crap. I think you're right.
I'm getting 17 at 1200 RPM (in park vacuum advance removed) in gear it drops to 750 RPM and it's at 12" of vacuum. I think I haven't tightened the intake manifold enough. Last time I stripped the bolt hole PITA to fix and now I have a phobia. Thanks for your help.
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72 250 M130 W114 |
#18
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Hey Munich,
Just wanted to say thanks. Tightend the manifold nuts and the problem went away. She's been runng great ever since. Much appriciated.
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72 250 M130 W114 |
#19
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It's amazing what can loosen up
I was inspecting the contact points, and as my hand bumped the Distributor, it moved.
Well, the 2 Distributor housing Hex bolts were loose. Go figure! BTW, check your exhaust manifold bolts. They are often loose, and overlooked.
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1970 280S M130 engine- good runner 1971 250 M130 engine- #2 rod bearing, gone 1971 280SE (blown engine,parts car) 1977 German 280S W116-only 33 years old Last edited by MunichTaxi; 12-14-2007 at 09:00 PM. Reason: correction |
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