warrensmanche Posted February 3, 2011 Share Posted February 3, 2011 this has been a problem ever since i owned this.at idle it will go up and down in rpms.its not bad at all but i know its not right and i just always wondered what it was.no one seems to know.also is a knock senser really need.i don't have a knock but i hear it hurts fuel economy.also what are all you guys gettin fuel milage wise.i got 33s with 4:11 gearing, 4x4, 4.0 renix, and a aw4 tranny and i always leave it in power mode.during summer i got about 14-15 and now durring winter I'm gettin 10-11.maby its just my foot and all the detours i take.But i guess for what it it thats not to bad. Link to comment Share on other sites More sharing options...
mule13 Posted February 4, 2011 Share Posted February 4, 2011 i got basically same setup but with ax15 tranny only time i did fuel check was highway travel between nc and florida highway miles. i was running pretty fast 75 to 80 mph according to tomtom anyway. i was getting 15 mpg during that trip Link to comment Share on other sites More sharing options...
warrensmanche Posted February 5, 2011 Author Share Posted February 5, 2011 well i guess my fuel economy is about right then.just wanted to compare.any body know any thing about my serging isue? Link to comment Share on other sites More sharing options...
MJRemi Posted February 5, 2011 Share Posted February 5, 2011 I may not have the expertise that others seem to have but I had the same symptoms. If your injectors are all in good shape, try replacing the fuel filter. I did mine a couple days ago and the surging seems to have stopped. I never measure fuel consumption so I can't help on that. Good luck! Link to comment Share on other sites More sharing options...
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