cold weather MPG
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Cargo Master
Joined: Dec 2003
Posts: 2,022
Likes: 4
From: Redford, Mi.
cold weather MPG
My 2001 F350 V10 gets resonably good mileage until it get cold. Last week it got the mid twenties and the mileage just dropped like in half, that can't be right. No codes, seems to run fine except for that darn gas gage. Anything I can try to find the culprit.
Postmaster
Joined: Mar 2001
Posts: 4,968
Likes: 3
From: So Cal
Part of the problem is that winter gas in many areas has different additives which decrease the mileage significantly.
Also your engine will spend more time running cold when it burns more gas trying to warm itself up.
Could also be differnt driving conditions like traffic, weather etc which will affect the mileage.
Getting half is a bit extreme but 10-20% isn't unusual I would think.
Good Luck,
Jim Henderson
Also your engine will spend more time running cold when it burns more gas trying to warm itself up.
Could also be differnt driving conditions like traffic, weather etc which will affect the mileage.
Getting half is a bit extreme but 10-20% isn't unusual I would think.
Good Luck,
Jim Henderson
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Cargo Master
Joined: Dec 2003
Posts: 2,022
Likes: 4
From: Redford, Mi.
Thanks for the ideas, I also had a problem with it not starting today, I had to hold the gas down and start it and then it idled, so I might try the cold idle compensator, could be sticking, that could be an issue.
Posting Guru
Joined: Mar 2005
Posts: 2,060
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From: Burnsville, MN
I normally get 10 mpg in summer, 9 in winter, mostly commuting 12 miles to work on sideroads. Of course I also carry about 400 pounds of sand in winter..... I have to believe that a 50% change in mpg is majorly excessive and its not really weather related.....
Such a major decrease in mileage is more normally associated with something like carrying a really good load over the mountains........ You did remember to disconnect your 5er didn't you?......
Such a major decrease in mileage is more normally associated with something like carrying a really good load over the mountains........ You did remember to disconnect your 5er didn't you?......
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Posting Guru
Joined: Mar 2005
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From: Burnsville, MN
Wipe the inside of your exhaust pipe clean , run it 10 miles or so when its good and cold, and wipe it again. Hope that its black. If not, you'll have to ask some really nasty questions about where the gas is actually going....
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Posting Guru
Joined: Mar 2005
Posts: 2,060
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From: Burnsville, MN
Wait a minute, you have a 2001 V10. I.e., Isn't this is during the years where the heads had a low thread count so the plugs work their loose until they pop out? If you're not already familiar with the issue, search for plug blow-out. And in any event, you're going to want to check your plug torque.
Lead Driver
Joined: Sep 2003
Posts: 5,844
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From: Albuquerque
Originally Posted by bubbasz1
Thanks for the ideas, I also had a problem with it not starting today, I had to hold the gas down and start it and then it idled, so I might try the cold idle compensator, could be sticking, that could be an issue.
biz
Junior User
Joined: Aug 2004
Posts: 53
Likes: 0
From: Northern VA
Is that the same issue (*A*ssuming it is the same as the modular V8) that they back out?
I had they happen to my expy 5.4L once and it damaged the COP mount. Thankfully I was able to (with my wife coming to get me) to get a new COP and plug at a local parts store and torque it correctly and replace the COP with a new one.
Had never heard of such a thing happening honestly until it happened to me.
HTH
I had they happen to my expy 5.4L once and it damaged the COP mount. Thankfully I was able to (with my wife coming to get me) to get a new COP and plug at a local parts store and torque it correctly and replace the COP with a new one.
Had never heard of such a thing happening honestly until it happened to me.
HTH