Holly sheet 5 mpg hamer Idaho to burns wy and burns wy. to Harrisonville MO. and and 230 miles of that was running with an empty trailer !!!! dam it ! Tell me what to do guys,,,, try to solve the problem or run it off a cliff and collect the insurance ?
2007 386 pete 475 cummins with active egr and cummins road relay 4, 13 speed 3:55 rears and 22.5 low pro tires......
and its a dog to boot ,feels like 375 hp
My NEW used truck SUX !!!!
Discussion in 'Trucks [ Eighteen Wheelers ]' started by 2hellandback, Jul 14, 2013.
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Its an emission ISX, so not surprising to me.
Only way to get power and MPG from an ISX is to get rid of the emission stuff, from the guys I know with them.
MartinMNdriver and landstar8891 Thank this. -
check for boost and exhaust leaks, shut off that EGR, VGT could be working improperly
How fast were you driving? Weight? Type of trailer? -
you might have a bad turbo, just replaced mine on my '07 ISX and fuel mileage jumped way up. What they call the sector gear that engages the variable part of it stops meshing correctly. Mine had 580K on it when I replaced it.
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does it have a check engine light on?
I would check out the basics before you start throwing parts at it if the check engine light is on that needs to be takin care of first. Also a valve adjustment wouldn't hurt if you don't know when it was done last. -
OH and that is the amber check engine light.
And over head was done about a month ago when they relpaced the injector cam and egr valve.Last edited: Jul 14, 2013
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Before you bought it did you put it on a dyno?
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