Jeremy_Brault Posted April 7, 2013 Share Posted April 7, 2013 Got an 07 chn with a 460/ 480 horse. When you pull it hard at like 1200 rpms it spits and like shakes the whole truck. Sounds like the egr doing it, but dont know the cause. Any ideas? thanks Quote Link to comment https://www.bigmacktrucks.com/topic/30733-07-chn-egr/ Share on other sites More sharing options...
slpwlker Posted April 7, 2013 Share Posted April 7, 2013 You sure your not lugging it down to far. Sounds like it is out of the power band and fighting to keep pulling Quote Link to comment https://www.bigmacktrucks.com/topic/30733-07-chn-egr/#findComment-176634 Share on other sites More sharing options...
Jeremy_Brault Posted April 7, 2013 Author Share Posted April 7, 2013 no cuz it does it when you hold it at that rpm and pull it hard, but if you floor it it will quit doing it once it hits 1300 rpms. Quote Link to comment https://www.bigmacktrucks.com/topic/30733-07-chn-egr/#findComment-176635 Share on other sites More sharing options...
slpwlker Posted April 7, 2013 Share Posted April 7, 2013 sounds like it is lugging and clears once you get to 1300. But thats my $.02 Quote Link to comment https://www.bigmacktrucks.com/topic/30733-07-chn-egr/#findComment-176638 Share on other sites More sharing options...
farmer52 Posted April 7, 2013 Share Posted April 7, 2013 What is the peak torque RPM rating? Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/30733-07-chn-egr/#findComment-176641 Share on other sites More sharing options...
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