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roy, import/domestic specialest
Category: Ford
Satisfied Customers: 6040
Experience:  ASE master tech for 40 years
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I have a 2010 5.4 3 valve and the engine occasionally has a

Customer Question

I have a 2010 5.4 3 valve and the engine occasionally has a spark knock. it is not showing any codes. it does not do this all of the time.
Submitted: 1 year ago.
Category: Ford
Expert:  roy replied 1 year ago.

good afternoon my name is ***** ***** I will assist

how do you know it is a spark knock??? if you have one, carbon is the biggest reason for this. it buildsup around the valves and will cause a spark knock.


Customer: replied 1 year ago.
It only does itwhen the vehicle starts up a hill. If you lifthink the throttle slightly it stops
Expert:  roy replied 1 year ago.

ok, thanks, ***** ***** be the egr valve not working either. I would remove the valve, clean it and all the passages and see if it helps, otherwise, you have a carbon build up issue


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