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Eric, Automotive Repair Shop Manager
Category: Ford
Satisfied Customers: 31908
Experience:  Automotive Repair Shop Manager, Technician
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Check out the hoses for leaks and found nothing any more

Customer Question

Eric: Check out the hoses for leaks and found nothing any more ideas?
Submitted: 10 months ago.
Category: Ford
Expert:  Eric replied 10 months ago.


Ok, if nothing on a visual check, it needs to be smoke tested, but in place of that, the next best way is with carb cleaner. You will need a helper. Have your helper crank engine and put in drive with foot on the brake. You take a can of carb cleaner and spray each vacuum hose one at a time, including the pcv hose and brake booster hose(if vacuum booster), then spray the air intake tube, then around the base of the intake. If one is sprayed and idle changes(smooths out or increases), that is your culprit.

If no difference, then we will go from there

Customer: replied 10 months ago.
Still waiting for a reply. No leaks on the hose's anywhere. Anymore ideas?
Expert:  Eric replied 10 months ago.

Ok, digging deeper, there is a service bulletin out that has several of the symptoms. It calls for installing a shim between the cam sensor and engine where it bolts to and if persists, to install new cam sensor. I have attached it for you