Bad Gas Mileage F150 2010 5.4 L - FordTough.ca - Home of Canadian Ford Truck Enthusiasts
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post #1 of 13 (permalink) Old 05-08-2017, 08:57 PM Thread Starter
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Bad Gas Mileage F150 2010 5.4 L

About a month or so ago my mileage decreased by about 25%. My truck has about 180,000 km on it. I replaced the plugs and the air filter and it made no difference. My next guess was an was an O2 sensor issue but then I ran across this video on calibrating the throttle body after disconnecting the battery.


I was wondering if it was something as simple as this, since I had disconnected my battery to clean the posts. Anyone have any thoughts on this?

Thanks.
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post #2 of 13 (permalink) Old 05-09-2017, 08:33 AM
 
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Any codes?
Brake dragging?
How's the truck running overall?.
Could try the TB reset and see if it helps..and it's free 😊
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post #3 of 13 (permalink) Old 05-09-2017, 04:54 PM
 
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Lead foot?

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post #4 of 13 (permalink) Old 05-09-2017, 10:40 PM
 
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How bad is bad?

When was the last time the fuel filter was changed?
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post #5 of 13 (permalink) Old 05-10-2017, 03:43 PM
 
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Quote:
Originally Posted by herbz View Post
How bad is bad?

When was the last time the fuel filter was changed?
I believe the filter on the 2010 is in the tank so probably never. I'm with Northern Supercrew, check for codes

Such is life. Just passing through.

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post #6 of 13 (permalink) Old 05-10-2017, 07:08 PM Thread Starter
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Thanks for all the input guys. It's great to have a place to ask.

No codes generated at all. No sticking brakes. No lead foot for sure lol (anyway if I had a lead foot then the gas consumption would be the same). Definitely never replaced the fuel filter.
How bad is bad? It went from 14L/100km to 19L/100km which sucks when you periodically do a lot of driving like I do.

I did the PCM reset so I guess it will take a couple of days before I see if that helped. The truck was running well but it does seem to be running smoother.
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post #7 of 13 (permalink) Old 05-11-2017, 08:52 AM
 
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Quote:
Originally Posted by Mrmagoo View Post
I believe the filter on the 2010 is in the tank so probably never. I'm with Northern Supercrew, check for codes
You would be correct. I didn't know they changed them. Seems kinda silly to me.
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post #8 of 13 (permalink) Old 05-11-2017, 11:55 AM
 
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Anything to make it tough on the people who still like to work on their own stuff.
Wife is driving a Dodge Journey with 283 hp 3.6 V6, goes like stink but need to pull off intake
manifold in order to change plugs and no dipstick to check transmission fluid. Go figure. Whats dealer labour these days? $140 to $150 per hour!!

Such is life. Just passing through.

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post #9 of 13 (permalink) Old 05-12-2017, 10:24 AM
 
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disregard - was thinkin air filter but I see you've been there already
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post #10 of 13 (permalink) Old 05-23-2017, 11:12 PM Thread Starter
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Update - the PCM reset did the trick. After about 1 1/2 tanks of gas I am back to 14L/100km. The truck is running great. Needless to say I am pleased.
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