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Daryl, Shop Owner, Master Mechanic
Category: Ford
Satisfied Customers: 12548
Experience:  28 years experience, Master Mechanic
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2004 f150: miss..liter..highway driving..the spark plugs were changed

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2004 f150 5.4 severe engine miss with code p0345

Forgot to add engine has been using more oil sometimes 1 liter to 500km under normal highway driving. And the spark plugs were changed also, bank 1 looked normal (brown/gray color) bank 2 plugs were black
This problem is usually caused by the timing chain or the cam phasers so these will need to be inspected and tested to be sure. This is a major job and special equipment is needed.
Customer: replied 7 years ago.
Cams, cam followersand cam phasers were changed 25000 km ago, not sure about the chains, will they stretch enough to cause this problem? Engine has 176,000 km ??miles
The chain do not usually stretch to cause this problem because there is a chain tensioner but sometimes the tensioner fails or the chain guides fail to cause this problem.
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