Question about 2005 Ford F 350 Super Duty
I would definitely suspect oil contamination on the mass air flow sensor. It works by comparing the temperature of a heated platinum wire in the air stream with a reference. If the wire gets loaded up with oil, it will not be cooled at the proper rate, and will report a lower air flow rate than is actually going through. This will cause the computer to reduce the fuel flow, which would cause the engine to lag under load.
Inspect the air flow sensor element using a bright light. If you see a visible oil film, try removing it with electrical contact cleaner. Change back to a conventional filter, then let the engine idle for a few minutes to dry off the contact cleaner (the sensor wire will be hotter at low speed). In the worst case, you may have to replace the sensor.
Posted on Apr 11, 2011
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Posted on Jan 02, 2017
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