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 rpmdiag Your Own Question
rpmdiag, Tech and Instructor
Category: Lincoln
Satisfied Customers: 6716
Experience:  Since 1975
Type Your Lincoln Question Here...
rpmdiag is online now
A new question is answered every 9 seconds

I have a 2013 Lincoln MKX. At about 55,000 miles I started

Customer Question

I have a 2013 Lincoln MKX. At about 55,000 miles I started hearing a pinging sound after highway driving (70 mph) for an hour or two. The sound happens while accelerating, cruising and coasting down hills. There seems to be no correlation with the gas pedal. It happens while in cruise control too.
Submitted: 4 months ago.
Category: Lincoln
Expert:  rpmdiag replied 4 months ago.

Hi, I’m Ron and I can help you.
I have been in the auto repair business with my own shops since 1975 and also teach automotive repair. I am confident we can resolve your problem together. Please understand that I don't know your skill level. In most cases when you have a problem with the way the vehicle performs, specialized tooling is required to acquire computer data/information or engine testing results. We didn’t build these complicated vehicles; we just diagnose and fix them. Also understand that I can't see, smell, hear, or touch the vehicle either, so it may take a few replies to get to satisfactory results. I am also going to direct you with the fastest, easiest and most common things to check first. Please be patient and permit me to do what I do best.
I also try to give all of the information you may need, expecting a “positive rating” in return. I will also continue assisting you after you have rated me, if necessary. If there is any reason I cannot get a positive rating, please let me know why “in advance”, so I can go another direction for you. I am sorry you’re having this problem; I’ll help you through it.

Low octane fuel or bad fuel will cause that, as well as the KNOCK sensor not working to retard timing enough to escape pinging. This can be tested with a scan tool.

Thanks, Ron

Related Lincoln Questions