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Discussion Starter · #1 ·
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 |

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?
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