GEN 1 Lower than normal MPG?

[Ruger]

Check the plug wires, make sure none of them are loose, check the plugs and make sure they are tight.

Won't the truck throw codes if a plug or a wire fails?

 

[Ruger]

I think the before tune up mileage was wrong. Very few 6.2 Raptors do better than 12-13mpg average.

Then mine is one of the very few.

 

[Canuck714]

You are a lucky one Ruger...
I have had 3 Gen 1's and none Averaged 15... Can I see it on the highway, sure, but town will kill it again.lol
When brand new, my 13 on stock wheels /tires averaged 13.9- 14.1 for its first 6 months, then got 35 Toyos and mid perch and never saw above 13 for an average.
My 14 Roush on 37's was a solid 14 after the JDM tune. Before it was happy to see 12
The 11 that has all the built suspension on 37's is 11.7 to 12.4 all the time.

 

[Ruger]

Won't the truck throw codes if a plug or a wire fails?

@FordTechOne , would you kindly respond to this question? I'd appreciate it.

 

[FordTechOne]

@FordTechOne , would you kindly respond to this question? I'd appreciate it.

Sure. It will only set a DTC if the plug or wire is damaged or worn enough to cause a misfire. The PCM doesn’t monitor the secondary side of the ignition system.

 

[Vash]

The Gen 1 was only rated up to 14 mpg highway. While folks have gotten higher than that, it’s unlikely you were getting better than the rated fuel economy with heavy aftermarket front/rear bumpers and wheels/tires.

 

[SVT_Samson]

Mines been getting 8-9 city, 13 highways. Leaving me between 10-11 combined. I do a lot of stop and go city driving, but this honestly sounds worse that what I'm hearing It's supposed to be. Original dealer brochure said 13 combined. And I've heard other places I should be getting closer to 14. If that's the case, my truck is struggling with no engine lights or problems. Currently sitting at 158k miles.