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Black smoke from exhoust 850

posted by  KlausC on  Fri Dec 2 14:57 CST 2011
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

Keep it up and you will need a new cat converter and O2 sensors.

Rich running can come from broken, cracked vacuum lines, a bad fuel pressure regulator, bad engine temp sensor, bad thermostat, etc. If the dash temp gauge reads normal, then I would start by checking all vacuum lines going to the intake manifold.

Check the vacuum line from the fuel pressure regulator to the vacuum tree. If there is gasoline in it, you need a new FPR.

Klaus
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