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36 Posts
Discussion Starter #1
Filled up today and hand calculated my mileage to be 11.4, little less from last weeks 12. Anybody have any ideas on how I have such bad MPG?
 

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Crazy wid da cheeze wiz
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2,411 Posts
Dont really have a heavy foot, change fuel filter every 5,000. Is their a way to check the HPOP?
Yes if you have a scan tool. And does the CEL come on if you get on throttle for a while? And how many miles are on your truck?

Check for boost leaks also.
 

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Livin in the flatlands.
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525 Posts
HPOP and fuel filter don't have jack to do with it. Your 4x4, automatic, and CC are killing you.
Yeah, but it still shouldn't be that bad. I averaged 11 pulling a 12k gooseneck trailer down to KS and back. I'm getting around 15-16 commuting to work, and have a CC auto 4x4.
 

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My crew cab, 4x4, dually gets 14.5 stock hand calculated and 17 with the chip on. Id say somethings wrong somewhere. I'd start with boost leaks
 

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Discussion Starter #10
Yes if you have a scan tool. And does the CEL come on if you get on throttle for a while? And how many miles are on your truck?

Check for boost leaks also.
The CEL comes on when I really put my foot into it, but thats because i dont have a boost fooler. The truck has 160,000 miles on it.
 

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get your codes checked... you have issues...
 
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