frequency valve installation - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 03-16-2007, 11:06 PM Thread Starter
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Date registered: Mar 2007
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frequency valve installation

I am a new owner of a 1985 500SL. There is a rubber fuel line with banjo fittings on each end and a frequency valve in the middle. This fuel line leads from the fuel distribution center at the back of the engine to an assembly (don't know what it is) at the front (and slightly to the passenger) of the engine. The line was leaking, so I had a new one built but didn't include the frequency valve in the line, because it was leaking, and I was told it was only for emissions purposes. Now the engine does not run very well, so I think I need to add the frequency valve back in the fuel line but don't know which direction to install it. Please help.

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