The hose - this hose will make a serious vacuum leak, and will absolutely make the car run rough and/or stall. There is a specific part for it, a molded hose with two 45 degree bends in it. I have found that fuel line hose works fine in that spot.

Do check the OVP relay, it will cause stalls, inability to idle, and the ABS light to come on, among other things. Kind of a notorious part really.

Check for dubious repair attempts. Often when there is something like a bad vacuum leak, instead of fixing the problem, people tend to do something else to compensate. If you've fixed a problem and now the car runs worse, do look for hack repair attempts.

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition