Question about 2008 Ford F-350
Posted by Anonymous on
You need to check the inspection report, to see what the exhaust readings were. They may be a clue,to how you approach your troubleshooting
If,say the HC and O2 were high-Misfire as possible cause,from unburnt fuel
CO was high- rich condition
Check all basic stuff--Air Filter,Clean MAF Sensor, good spark plugs,install full synthetic oil,vacuum leaks,etc.
Posted on May 11, 2010
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Posted on Jan 02, 2017
it may have a dirty mass air flow sensor (MAF) and could couse a rich condition that would fail emissions test. it should throw a code but not always its a pretty delicate sensor and the contaminant may not b visible if u put an oil filter on it(K&N) if i use too much spray the sensor will malfuntion as it gets coated with oil. Gently remove the MAF from housing and spray the two sensor forks with carb n choke cleaner to remove contaminents.
Posted on Mar 17, 2010
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