[Excursionator]

I have a 2008 Expedition that I bought last summer and everything was okay on it for almost a year.

This summer, the gas mileage is all of the sudden in the toilet.

Edmunds says it's supposed to get 14 mpgs

2008 Ford Expedition MPG - Gas Mileage Data | Edmunds.com

And it was getting that or better, but now it's getting 9ish, if that. It seems like every time I take it down the road I'm putting gas in it. It also has a ticking sound. The oil pressure is good, it's not overheating at all.

Someone on another forum suggested that it might have a dead cylinder but no one could really tell me how to check for that...ideas?

 

[Excursionator]

I was also told that it could be a bad injector? Would that cause a noise though?

My dealer has them for 32ish a piece Parts Search - BlueSpringsFordParts.com

So possibly an easy and cheap fix, but again, not sure about how to test.