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Old 07-15-2014, 10:26 AM
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200000 miles

Hello, I have a 2000 excursion with a 7.3l, 4" exhaust with 6"tip, k&n air filter. I recently turned over 200000 miles and I have noticed my fuel milage going down. I used to get 15 pretty much no matter what except when I towed my 34' toyhauler and it would go down to 10. Now I get 12 and 8. I faithfully change the oil (even the top 3 quarts) and the fuel filter. I put in fuel aid every service also. Is there anything I can do to get it back? I was also reading that it is a good idea to flush the motor, but I don't know what to use on a diesel? Someone mentioned the napa engine flush is good. if so do you use only 1 can or more because of the oil capacity?
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Old 07-15-2014, 10:53 AM
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Any performance mods like tuning?
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Old 07-15-2014, 10:54 AM
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And I'd get rid of the K&N filter, their known to allow dirt to pass through and basically be useless
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Old 07-15-2014, 10:55 AM
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Congrats on being a member of the 200K club!!

One thing to check would be the brake calipers to see if any of them are dragging. Sometimes the pins that the pads slide on get yuck on them and they limit the movement of the pads.

Have you been using the AC more than usual?

What part of CA do you live in?
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Old 07-15-2014, 06:31 PM
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no, I don't have any mods, but I was thinking of trying one that would help with mpg, any recommendations? what filter would you recommend running? I live in southern ca, Hesperia to be exact. no, I don't run the a/c any more than usual. any other ideas I could check it might just be getting old!!!!
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Old 07-15-2014, 06:55 PM
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Clean your ebps tube and sensor. YouTube has a few videos.
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Old 07-16-2014, 01:49 PM
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Get a 6637 air filter if u can have those in CA. your injectors are probably starting to lose life and that will decrease mileage greatly. Also clean EBPS tube and sensor. And get a Hydra or some type of similar tuner and you should be back near the 20s if all of that was done Including injectors.
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