Truck sucks down some gas @ idle?! - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 01-06-2012, 08:47 AM Thread Starter
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Truck sucks down some gas @ idle?!

Last night I let my truck idle for about 20 minutes before I left work, only had 60 miles into tank after filling up!!! Came out & truck is nearly on 3/4's a tank??? Was nearly on F when I started it up... Is this normal??
It's cold so it set its self on high idle, I have a dpf delete 4inch down pipe back & have an sct running the RCD 585

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post #2 of 15 Old 01-06-2012, 09:37 AM
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I don't know if it's normal, but I'm experiencing the same thing. Now that it's gotten cold here I've been giving my truck 5-10 minutes to warm up every morning (usually wait till my ECT and EOT are at least 50 degrees before leaving). The other day my "miles to empty" dropped by 15 after about a 8-10 minute warm up. Not that those things are super accurate, but I've also seen drops in the needle after long idle's, as well as an overall drop in MPG since I started letting it warm up in the mornings.

Not sure why, but it sure seems like these truck chug the gas when idleing.

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2008 F250 Lariat - CC / SB / 4x4
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She finally gave it up after about 20 mins.
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post #3 of 15 Old 01-06-2012, 09:48 AM Thread Starter
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Ya... My gas mileage is a Lil lower than what most are posting & the miles till empty usually has a decent drop. Only had the truck about 3 weeks so still trying to figure out the do's & don'ts & lookin like 1 of the don'ts is no long warm up idles lol!

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post #4 of 15 Old 01-06-2012, 11:25 AM
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Get used to it! These things are thirsty, esp when cold.

2008 Job 3, F350, 6.4/drw/lariat/CC/LB, Spartan, Viper 5902, Line-X, Flo-pro egr delete, aFe stage 2 proguard 7, MBRP Cool Duals/downpipe/CAC, CCV mod, coolant filter PMF 7" 4link, Rigid Dually fogs, Royalty Core 3pc, Crown brake lines, Mishimoto Rad
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post #5 of 15 Old 01-06-2012, 12:50 PM
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If you bought a 6.4 for mileage you f***ed up. That would be like buying a chevy for a nice interior, it ain't gunna happen
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post #6 of 15 Old 01-06-2012, 01:05 PM
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Stop putting gas in it...

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel



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post #7 of 15 Old 01-06-2012, 01:35 PM Thread Starter
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Lol.... I'm not exactly complaining about the mileage, just making sure somethin wasn't
F-ed up w/ my truck!!! Now I know not to let it sit & idle... I'm coming from owning a dodge v10 drw for the past 6-7yrs, that I regularly used to tow my 32 fountain that it & the trailer weighed 10k+lbs... Needless to say its still a huge upgrade in the mpg department!!!

One other thing, does plugging the truck in help w/ getting heat to blow warmer faster? Truck didn't come w/ a plug in cord & I have yet to pick one up.

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post #8 of 15 Old 01-06-2012, 02:08 PM
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Originally Posted by the-last-international View Post
If you bought a 6.4 for mileage you f***ed up. That would be like buying a chevy for a nice interior, it ain't gunna happen
Me getting 20 plus mpg on the hwy is pretty damn good. At least I think so.


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post #9 of 15 Old 01-06-2012, 03:51 PM
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Me getting 20 plus mpg on the hwy is pretty damn good. At least I think so.
Must have a solid tailwind!


Im not sure if its in my head but since deleting the egr I seem to be getting a bit more outa the fuel tank..Might have to track it and find out.

2008 Job 3, F350, 6.4/drw/lariat/CC/LB, Spartan, Viper 5902, Line-X, Flo-pro egr delete, aFe stage 2 proguard 7, MBRP Cool Duals/downpipe/CAC, CCV mod, coolant filter PMF 7" 4link, Rigid Dually fogs, Royalty Core 3pc, Crown brake lines, Mishimoto Rad
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post #10 of 15 Old 01-06-2012, 04:37 PM
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I dont idle my trucks, its bad for them lol.

At home i of course plug them in and roll out because the temps are 120+

At work i started the 6.0 up and high idle only till the temps were 65 or the windshield defrosted i just took it real easy tillt he temps were 100 normally by the time i was out of the work parking lot. Its about 1/2 mile drive at idle.

New 08 and this morning it was 28, fired right up turned on the Defrosters and no kidding in 2 miutes my winshield was defrosted enough to pull out and start the 1/2 mile idle out the parking lot EOT was 75. By the time i got to the end of the parking lot winshild was completly defrosted EOT was 100.

50 mile trip to and from work yester day was 15.5mpg
in my 6.0 it was 16.5 normaly in winter. So 1mpg stock isnt to bad i think.

08 F350 6.4 Lariat CC LB tows a 13 Moomba Mojo 2.5
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