Haunted by Steve's post...on my never ending quest on improving my old girl...

Found another vacuum leak last month...the connection hose between the idle air distribution hoses has a large crack on it. Since these hoses are pretty brittle (very old) and might break if I try to remove them, I just put a dab of RTV clear goop on the leak. Let it cured for a while and took the car out for a test drive. My economic gauge no longer bottoms out on moderate accelerations (shows more vacuum in general); and the transmission shifts much better.

Have been playing with the transmission/throttle linkage and adjusting the vacuum modulator since - very very smooth shiftings.

Just wanna share my findings...
Frank.

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'86 560SEL | Silver Ext. / Blue Int. | 201K miles (Apr. 05) | 204K miles (Feb. 06)