o2 sensor ? 1990 300se

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o2 sensor ? 1990 300se

02-03-2011, 10:12 AM

LandYaghtLover LandYaghtLover is offline

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Join Date: Jun 2010

Location: Green Bay, WI

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I love Seafoam.

http://www.youtube.com/watch?v=vRAV5ln5cUc

And as sptt says, check the duty cycle. If your air/fuel is off you will have a rough idle and probably bad economy. I used a simple digital volt meter to check and adjust mine.

M117 how to test lambda?

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car

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