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Old 05-15-2012, 07:57 PM
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Big drop in fuel mileage? Updated.

Hey guys new to the forum . Fuel mileage dropped over 100 miles per tank. Fuel light came on at about 330 miles on tripometer, 95% freewAy driving. Here is a little background on the truck. New injectors 1 year ago, full bullet proof kit installed 6 months ago along with new oem turbo, and new hpop.
Now the drop came right after bullet proof, turbo and hpop install. As I dont drive my truck but on the weekends, I wanted to give her a fighting chance before I talk to my tech. I have only put fuel in her 4 times since bpd install.
Any thought as to what could possibly be the issue before I take her in? I am going to do an oil change and get an oil sample to see if I have fuel in my oil ( the reason injectors were replaced to begin with.) but keep in mind this drop in mileage happened after the other installs 6 months later. I check airfilter, all is good there.
Anybody is welcome to chime in. She runs like a champ, and I dont smell anything out of the ordinary on the ol dipstick.

Thank You
Brad

Last edited by bradaxo; 05-18-2012 at 08:48 PM. Reason: Adding to thread
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Old 05-15-2012, 08:06 PM
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Did you get a strategy reflash? The newer flashes all produced poorer fuel economy (and power reductions) in the effort to preserve engine longevity.

Jonathan
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Old 05-15-2012, 10:10 PM
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Quote:
Originally Posted by howell_jd View Post
Did you get a strategy reflash? The newer flashes all produced poorer fuel economy (and power reductions) in the effort to preserve engine longevity.

Jonathan

I will have to ask the tech that worked on the truck. Is a flash typicaly something just a dealership does or is it pretty common in other shops? I did not have it wrenched on at a dealership.

Thank you
Brad

Last edited by bradaxo; 05-15-2012 at 10:17 PM.
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Old 05-18-2012, 06:56 PM
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just out of curiosity check how long it takes for your oil to get to 185*
make note of ambient temp., ect, and eot at startup, time it with a stopwatch till 185*
i would really like to know to compare to a situation i have here thanks
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Old 05-18-2012, 07:31 PM
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I believe it's just the dealer (never really thought of an independent doing it and I don't see why or how they would, too many vehicles out there to know what to update). If the truck was in for a diagnosis they may have done it then.

How's it starting and idling? What's you FICM voltage while cranking and just after start-up?

Oh and
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Old 05-18-2012, 08:35 PM
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Thank you for the replies and welcome. The truck absolutley starts and runs like a champ. I think l might have figured out the problem. At least one locked front hub maybe both. Last time l went fourwheeling was not to long after l had BPD kit installed. Hence the thinking it had to be related. I have had the truck for almost three years and the pva solinoid has never worked, so l just manualy lock hubs when going fourwheeling (which is not often, l just dont want to spend the eighty bucks for said solinoid). So long story short l discovered the hub/ hubs were locked. I unlocked them the last time fourwheeling but at least one stayed frozen. You would think a guy would have noticed but NO I WAS JUST DUMB ENOUGH TO NOT FIGURE IT OUT TILL NOW. I just finally put 2 and2 together, lesson learned. I had two different techs confirm(and got a pretty good laugh) that the locked hubs could very well be my issue. So l will run a test and see.
Oh yeah took hubs out and lubed , the passenger side was a bear but l got her. Plan to ditch these auto lockers and get some manual Warns.
I thought l said long story short............. Sorry guys.
Thanks
Brad

Last edited by bradaxo; 05-18-2012 at 08:50 PM.
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Old 05-19-2012, 10:15 AM
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lol... well at least it's figured out! It's always the simple things that are the hardest to figure out!
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