wtf?

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Feb 11, 2008 | 10:41 PM

87white250

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Joined: Jan 2008

Posts: 38

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wtf?

i have an 87 f250 with the 4.9 manual in it and I am gettin about 10mpg! what the hell is going on, i just dont get it its a 4x4 but im not just wide open all the time, well actually never.... what is wrong with my truck? ANY ADVICE would be awesome

Feb 11, 2008 | 11:26 PM

Truckin4life

Street Queen to the extr3m3

Joined: Jan 2005

Posts: 4,554

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From: Lubbock, Texas

Does the engine seem to be lagging. I would check e-brake to start with, check brakes see if there dragging. Is the timing right? Plugs gapped correctly, correct firing sequence. Check those things first, also run a bottle of fuel system cleaner through the tank see if that helps.

Later,
Don

Feb 11, 2008 | 11:29 PM

95F350XL

Posting Guru

Joined: Aug 2007

Posts: 2,026

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From: Belle Mead NJ

Also when was the last time you had a tune up? Air, fuel, pcv, plugs, wires, cap, rotor? Are you towing alot, hauling alot? I got 10mpg with my 36's and a 351w.