1986 420SEL transmission adjustment for idle under load

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1986 420SEL transmission adjustment for idle under load

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08-06-2012, 11:53 PM

shadetree77 shadetree77 is offline

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Join Date: Jul 2003

Location: Tennessee

Posts: 430

my 91 420sel idles at 525 in gear and it's smooth. if the economy needle is not pegged to the left then you have a vacuum leak somewhere causing the rough idle. you can also try cleaning the idle air valve to see if it improves the idle

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