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I have a 2010 5.4 3 valve and the engine occasionally has a…

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I have a 2010 5.4...
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: 2 years ago.Category: Ford
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Answered in 10 minutes by:
3/6/2016
Ford Mechanic: roy, import/domestic specialest replied 2 years ago
roy
roy, import/domestic specialest
Category: Ford
Satisfied Customers: 7,901
Experience: ASE master tech for 40 years
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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.

Roy

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Customer reply replied 2 years ago
It only does itwhen the vehicle starts up a hill. If you lifthink the throttle slightly it stops
Ford Mechanic: roy, import/domestic specialest replied 2 years 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

Roy

please dont forget to rate me as it is the only way I get paid for my efforts

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