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My truck had intermittent idle. Had it put on code reader…

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My truck had intermittent idle...
My truck had intermittent idle. Had it put on code reader and replaced both vct solenoid s and both cam position sensors. Runs worse now.
Submitted: 7 months ago.Category: Ford
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Answered in 5 minutes by:
11/29/2017
Ford Mechanic: Kenny Z., Ford Senior Master Tech replied 7 months ago
Kenny Z.
Kenny Z., Ford Senior Master Tech
Category: Ford
Satisfied Customers: 6,019
Experience: Auto Trans, Drivability and Electrical Specialist
Verified

Hello, my name is***** and thanks for your question.

Is it also making a rattling diesel type noise at idle? Have you had it checked for codes? Does it seem like it is only firing on one bank of cylinders? (one side)

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Customer reply replied 7 months ago
it sounds like a diesel at times. The code reader said to replace both vct solenoid and cam sensors. Which I did
Ford Mechanic: Kenny Z., Ford Senior Master Tech replied 7 months ago

Do you know the actual codes? There are no codes that actually state to replace parts without additional testing. If only it were that easy! For the problem you are experiencing I would expect to see codes:

P0011, P0012, P0021, P0022, P0340, P0345. Any of those present?

Did you use the new style high flow Ford VCT solenoids, part number 8L3Z-6M280-B?

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Customer reply replied 7 months ago
It listed all of those codes. I bought some online, they were 90.00
Ford Mechanic: Kenny Z., Ford Senior Master Tech replied 7 months ago

Ok thanks. I'm not sure if aftermarket VCT solenoids are manufactured to the same flow level as the Ford updated ones. The problem with these engines is lack of oil pressure to the camshaft phasers. The phasers are supplied oil through the VCT solenoids. Ford redesigned the VCT solenoids to specifically overcome the low oil pressure issue to the phasers. On the 08 and newer, the new solenoids usually fix it unless the engine is too far gone. The 07 and older engines usually have base oil pressure concerns that the new solenoids cannot overcome. I have seen the new solenoids not fix the 08 when the engine is too far gone on oil pressure. The oil pressure needs to be 25 psi minimum at idle in gear with the engine fully hot.

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