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code 511 900

posted by  Rule 308 on  Tue Jul 12 03:41 CST 2005
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last visit: Tue May 8 09:20 CST 2012
[RELATED]

If I can assume that we are talking about the LH system here, a code 511 is defined as "long term fuel trim lower limit". The sounds more like the computer compensating for a rich condition and not a lean condition that a vacuum leak would cause. You might want to look for things like a faulty fuel pressure reg or a dirty air filter to start with.

Mark






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