How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask roy Your Own Question
roy
roy, import/domestic specialest
Category: Ford
Satisfied Customers: 4656
Experience:  ASE master tech for 40 years
3506196
Type Your Ford Question Here...
roy is online now
A new question is answered every 9 seconds

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: 9 months ago.
Category: Ford
Expert:  roy replied 9 months 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.

Roy

Customer: replied 9 months ago.
It only does itwhen the vehicle starts up a hill. If you lifthink the throttle slightly it stops
Expert:  roy replied 9 months 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