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  #1  
Old 10-02-2012, 09:37 AM
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Default what happened???

so i was driving out to work for my 2 week hitch in texas(oil field work) 7 hour drive.the whole way i was ranging from 17-21 mpg. but then about an hour from my destination mpg DROPS to only 11-13 mpg and stayed that way so had to stop and put more gas and was on E again after just a 40 minute drive.whats going on????
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  #2  
Old 10-02-2012, 09:50 AM
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Man, wish I can provide more info here, but I too would like to know the answer to what happened.
Sounds like you need to take it to the dealer though
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  #3  
Old 10-02-2012, 10:13 AM
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I would guess that the MDS ceased functioning. Did you by chance knock the transmission out of D into a numbered gear? This would disable the MDS and increase your fuel consumption.
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Old 10-02-2012, 10:17 AM
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Originally Posted by MoparTech View Post
I would guess that the MDS ceased functioning. Did you by chance knock the transmission out of D into a numbered gear? This would disable the MDS and increase your fuel consumption.
Interesting.....but would it affect it by that much?
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  #5  
Old 10-02-2012, 11:08 AM
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It's possible, considering that you're effectively shutting down 4 cylinders when the MDS is active. He didn't mention an illuminated MIL, so I presume the engine is functioning normally.
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Old 10-02-2012, 01:40 PM
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Originally Posted by MoparTech View Post
It's possible, considering that you're effectively shutting down 4 cylinders when the MDS is active. He didn't mention an illuminated MIL, so I presume the engine is functioning normally.
Makes sense....
what does MIL stand for?
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  #7  
Old 10-02-2012, 01:45 PM
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Malfunction Indicator Lamp a.k.a. check engine light.
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Old 10-02-2012, 01:52 PM
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Quote:
Originally Posted by MoparTech View Post
I would guess that the MDS ceased functioning. Did you by chance knock the transmission out of D into a numbered gear? This would disable the MDS and increase your fuel consumption.
+1

i would also think that maybe the shifter went out of D, causing the rpm to be higher and running in 8cyl mode always,..

other than that, could be a fuel line leaking but you would smell it
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Old 10-02-2012, 02:04 PM
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Quote:
Originally Posted by MoparTech View Post
Malfunction Indicator Lamp a.k.a. check engine light.
Got it!
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  #10  
Old 10-02-2012, 02:09 PM
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Quote:
Originally Posted by MoparTech View Post
I would guess that the MDS ceased functioning. Did you by chance knock the transmission out of D into a numbered gear? This would disable the MDS and increase your fuel consumption.
no i never switch into any numbered gears.i always leave it in drive.(dont know how to manually shift) and no lights came on or anything. didnt smell fuel either.it did happen once i was under quarter tank of fuel thou.i thought it might have had something to do with that.but idk.
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