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Old 12-31-2007, 11:00 AM   #4 (permalink)
Hawk
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Join Date: Dec 2007
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I bench tested the O2 sensors with a voltmeter and they performed in range. I tested the EGR with a vacuum gauge and it was working fine. I did change the position sensor and eliminated the 34 code. I hve tuned it up and changed the oil and air filter. Now I'm pulling a 66 code (Mass Air).

The has just over 34,000 miles and has never failed before. This time it has doubled it's readings of hydrocarbons.

I'm stumped.
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