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Old 11-19-2002, 03:08 AM
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where does this hose go? (pic)

1988 300E

Off of the black breather hose coming out of the air cleaner there appears to be a small line that looks like a vacuum line. Unfortunately I cannot find where it attaches to so it is just hanging there. Does anybody know where it is suppose to attach and what might happen if I don't attach it.

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where does this hose go? (pic)-dscf0043_s.jpg  
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Old 11-19-2002, 08:03 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
That connects to the fuel system pressure regulator.
Allows fuel into the crankcase if the diaphram ruptures.
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Old 11-19-2002, 01:35 PM
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Great Thanks. Where exactly is the fuel pressure regulator located on my 103.983 ?

Thanks again!
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Old 11-20-2002, 10:52 AM
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Join Date: Aug 2001
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Posts: 3,044
It's the gold metal cylinder just under the air filter bolted to the front of the fuel distributor. That vacuum line plugs into the left end.
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