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Home
Cadillac
Deville
Engine
Symptoms
Poor Mileage
mpg and range are not being properly calculated
1994 CADILLAC DEVILLE
21,300 MILES
HENDRIX1
MEMBER
3 POSTS
FOLLOW
the display shows 23.0 mpg and the range displayed far exceeds what it should.
May 1, 2012 at 8:28 PM
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ASEMASTER6371
CERTIFIED EXPERT
52,796 POSTS
is your speedometer working correctly??
Roy
May 1, 2012 at 11:40 PM
HENDRIX1
MEMBER
3 POSTS
Yes, and the amount of fuel being used and left in the tank both appear to be correct
May 2, 2012 at 12:44 AM
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HENDRIX1
MEMBER
3 POSTS
I had a new fuel sending unit installed a couple of weeks ago. But the range and mpg are still not working properly.
May 2, 2012 at 12:45 AM
ASEMASTER6371
CERTIFIED EXPERT
52,796 POSTS
then if all else is working the module may have failed.
it may not be available anymore. call your local gm dealer and give them your vin number and see.
Roy
May 2, 2012 at 12:48 AM
CADIEMAN
CERTIFIED EXPERT
3,544 POSTS
this is controled by the ecm.what is the range when it read 2 gal.
May 4, 2012 at 7:32 PM