Ford COP systems are like that. If there are no codes, slight misfire/surge issues can be difficult to trace. I’m sure the technician was as frustrated as you at not being able to pinpoint the problem. These are OE engineering issues usually, not a lack of effort or competence. I would suggest a throttle body cleaning and a careful mass air flow sensor cleaning. Next step might be a "smoke machine" test to look for intake manifold vacuum
leaks.
Jim O’Neill
Chino Autotech Inc.
Nominations are being accepted for the 2024 Byrl Shoemaker/ASE Education Foundation Instructor of the Year award.
Applications are now being accepted for the 2024 Byrl Shoemaker/ASE Education Foundation Instructor of the Year. The award recognizes a high school or college instructor from an ASE accredited automotive, diesel/truck or collision repair program who demonstrates excellence through their personal dedication and commitment to the young men and women who have chosen to pursue a technical career in the automotive service industry.
Two specifications can be used to justify replacement — the condition of the additive package & the freezing point.
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Dorman offers these three tips to help to determine if it’s a valid warranty claim.
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Screwdrivers come in many shapes and sizes, and they are not created equal.
This often-overlooked undercar part
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Automotive solenoids translate electrical impulses into mechanical movement.
