yankeesheriff

I have a 2018 Ford f150 with 8,900 miles on it. I started hearing a spark knock a short time ago. Dealer stated it was misfire or timing issue in cylinder 5. They told me that they can not fix it and Ford stated it will not mess up engine. I don't buy that story, i traded my 2014 f150 that didn't have any problems at all, the dealership approched me for this deal. Does anybody have any suggestions, thanks yankeesheriff

Wicked ace

Go in and make the dealer manager (go right to the top) aware of what you were told. Call Ford customer service and open a complaint. If it's not looked into then find another dealer service department.

pboerschlein

I also have a 2018 that has a spark knock / pinging for the last 5k or so miles. It seemed to get worse when it got down into the 50's and is bad after first starting up going 35-45 mph when the truck is in 7-8th gear. I have started to also notice it now when the vehicle is warm and I am accelerating from a light or just after turning a corner. I have taken videos of it with my phone and the dealership told me that they could find nothing wrong with it. They told me that the flashed the computer and told me to try some 93 octane. it was better with 93, audible with 89 and worse with 87. It now has just under 15k on it and I am taking it in on Friday. Spark knock / pinging / pre detonation are not good things for our engine.

I am wondering how you are making out with your truck?

DarrinT04

the dealership employees are *** holes. they are required to fix it if truck still has warrenty in affect

thmsfraz

Mine started doing that exact thing really bad. Took it to the dealer. They reflashed the ecm and tried a few other things. Made no change. They ended up getting a Ford engineer involved. There response was that the 5.0 is a High Performance engine and requires a premium fuel. They stated that 89 octane fuel and up is not required but is recommended. They directed me to the owners manual where it clearly states this. After about the second tank of 93 the valve chatter had almost stopped. To date it is 99.9% better.Very rarely can you hear any spark knock whatsoever in mine. Truck runs night and day different. I usually fill my truck up when it is around half a tank. I will finish filling it up with 93 once then 89 on the next. The extra cost sucks but it doesn't sound like a 1970's wore out 350 either. Funny thing was, the day i picked my truck up from the dealer there was two other guys dropping there's off for the same issue.

pboerschlein

I suspected as such, the funny thing is the mechanic told me that it would probably clear up with 93, but I should be able to run 87. I guess with 93, it makes sense to get a tune and take advantage of it. My last truck was a Denali with a 6.2 L that I ran 93 in too. It got a bit better fuel economy than this one, but at least this truck does not shake all of the time.

dhmcfadin

Ford recommends premium fuel in their 5.0 and turbo engines. It's right in the owners manual.

"For best overall vehicle and engine performance, premium fuel with an octane rating of 91 or higher is recommended.

Do not be concerned if the engine sometimes knocks lightly. However, if the engine knocks heavily while using fuel with the recommended octane rating, contact an authorized dealer to prevent any engine damage."

It is basically stating that using fuel below the recommended octane rating will cause detonation. The fact that these engines run such high compression should be an obvious sign to run premium fuel. That's not new science, it's how it's always been. Run premium fuel, eliminate detonation.

http://www.fordservicecontent.com/Fo...rket=USA&div=f

Rig184

OCMike

iTrader: (1)

I've ran 93 or E85 in my truck after the first tank, even before I installed the blower. The dealer filled it the first time before I picked it up, probably put cheap stuff in.

It's only common sense an engine with a 12:1 compression ratio should get premium fuel.

Mike

dhmcfadin

Exactly.