01 Sierra 2500 4x4 /4dr Ext Cab/86k - Fuel Economy Sucks!!!!

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#11

08-14-2010 | 12:07 PM

RUFFNECK4LYFE

Toyota, Nissan, and Other Truck Forum Moderator

Joined: May 2009

Posts: 1,845

From: West Texas

Quote:

Originally Posted by pst1572

Thanks for the tips...I'm gonna change plugs and wires(and I usually am one for not settling for the cheap stuff.. In response to Timber74wolf - I haven't thought of getting the computer tuned yet. The rear is 3:73. The fuell filter was only changed once since I purchased the trk and that was around 50,000 miles. Haven't tried running a different brand of fuel. I understand excessive heat and using AC will hamper the fuel mileage, but I still think my issues of lowsy mpg are more than that... Thanks again for all the suggestions....

Just a little tip, I change out my fuel filter every oil change. Just about every time I have, it has been dirty. I changed out my fuel pump at about 130k. Now I have about the same on the new one and it runs good. Keeping everything clean will yield good gas mileage.

#12

08-18-2010 | 12:08 AM

02camarossle

Member

Joined: May 2010

Posts: 54

do a REAL fuel injector service, not the kind you put in your gas, that doesnt do ****. you have to have a tool but pretty much you disconnect your fuel line at the rail and hook up the tool to that and hook up air hose to the canaster and put fuel injector cleaner in the canaster and let the motor run off that until you run out, i did 2 cans worth and my mpg went up about 1 - 1.5 afterwards, and im on oe plugs n wires at 160K i need to change them i know just havnt gotten around to it.