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Rough idle, vacuum line, check valve 200

posted by  Vin on  Sat Jan 6 08:59 CST 2007
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last visit: Mon Jun 13 16:41 CST 2011
[RELATED]

Happy New Year to all!

My 91 240SE has been idling very rough.
Cleaned thruttle body.
Checked thruttle position gage
No code fron ECU.

Want to check the temperture sensor. Could someone let me know which pin on ECU connector to measure? What value to expect?

Just noted yesterday hissing sound coming from brake padle when applying brake. Vacuum leak? rubber hoses checked. Is check value the white connector on the caccum drum? It is loose when I wiggle it? Is this normal? Is it hard to replace?

Any tips appreciated!

Vin
91 245SE White station Wagon






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