Mileage after Oct. reflash
Thread Starter
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Postmaster
Joined: Aug 2003
Posts: 4,483
Likes: 2
From: Central Texas
Mileage after Oct. reflash
After the Oct. reflash, IMHO I have noticed a decrease in fuel economy from 16.5 to 13.1 and somewhat less acceleration with throttle wide open.
Anybody else experience similar post reflash problems?
Anybody else experience similar post reflash problems?
Post Fiend
Joined: Oct 2002
Posts: 11,314
Likes: 4
Is this hand caluclated or from the overhead...
I KNOW the overhead is a waste of energy it is so inaccurate.. bordering on fraudulent !
And I GAINED mileage after the Oct flash... but it still didn't make up for all the mpg I LOST after the July flash...
I KNOW the overhead is a waste of energy it is so inaccurate.. bordering on fraudulent !
And I GAINED mileage after the Oct flash... but it still didn't make up for all the mpg I LOST after the July flash...
New User
Joined: Nov 2003
Posts: 4
Likes: 0
I had the Oct flash about a week ago. It took care of the rough idle but didn't seem to do anything for gas mileage. I'm still getting around 16.5-17 highway/city. And I did the math. Can't complain!
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New User
Joined: Nov 2003
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I had my 03 6.0L reflash in Oct lost of power and fuel went to ______! Was getting 18 hwy and 16 city NOW 14 hwy & 12 city Took it to two different dealers and said it was fine. So the ford Rep. says there is no more they can do truck is fine. Trust me it's not same truck I paid 40K for. LOOKING for good Attorney. Anyone want to join in? Portland Or.
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Freshman User
Joined: Sep 2003
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From: Seattle, WA
Gentlemen,
Had been getting about 15.8 mpg before flash. Last tankful was 14.7. Better lowend power and accel. I'll wait a few more tankfuls before I really start to **** and moan. I will let Ford customer service know my feelings when I send in their survey for my last service.
Cheers,
Bryce
PS
Handcalculated mileage since truck was new.
Don't even bother with overhead display.
Had been getting about 15.8 mpg before flash. Last tankful was 14.7. Better lowend power and accel. I'll wait a few more tankfuls before I really start to **** and moan. I will let Ford customer service know my feelings when I send in their survey for my last service.
Cheers,
Bryce
PS
Handcalculated mileage since truck was new.
Don't even bother with overhead display.
Thread Starter
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Postmaster
Joined: Aug 2003
Posts: 4,483
Likes: 2
From: Central Texas
I sent a polite, factual summary of my experience in email to the service manager at the dealer after talking to the service writer and getting his concurrence. I asked them to speak to the Ford area tech rep.
They did and called me back today and asked me to bring it in tomorrow morning. Their diesel mechanic had reported some latest reflashes causing 3-5mpg reduction in fuel economy.
They are going to "reflash" my truck. I have upgraded firmware on many computer systems and know if you don't do it right, you can get some strange and even disasterous results. Maybe there is a procedural error on reflashing these things that causes the loss of fuel economy and lower performance.
I'll let you know after I have it done.
They did and called me back today and asked me to bring it in tomorrow morning. Their diesel mechanic had reported some latest reflashes causing 3-5mpg reduction in fuel economy.
They are going to "reflash" my truck. I have upgraded firmware on many computer systems and know if you don't do it right, you can get some strange and even disasterous results. Maybe there is a procedural error on reflashing these things that causes the loss of fuel economy and lower performance.
I'll let you know after I have it done.
Junior User
Joined: Oct 2003
Posts: 96
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I know alot of people have found their overhead average mpg fuel readout to be inaccurate. Evertime I fill up I do the math (have for years on various vehicles) and I have found mine to be with in .5 miles per gallon.