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Message: [QUOTE="madman1234509, post: 648527, member: 3910"] UPDATE...... I tried looking for the other thread that covered this but couldn't find it. I spoke before about a 2010 KR ccsb that my friend was trying to diagnose shaking at light throttle cruising down the highway. It started when the customer was using an edge tuner. He bought a Spartan thinking it would remedy the problem, well it didn't. Also my friend who has a Spartan tuned 6.4 and myself both had the same exact issue, but the 2010 truck seemed way worse. It would literally spill your coffee cup. So after the Spartan didn't work, we called innovative with no success and no answer. Finally I told my mechanic friend, I heard gearhead was doing good things on h&s mcc. He called them up, and within 5 minutes had a pretty confident answer as to why all of our trucks are doing this. He bought the minimaxx for the client, picked up some gearhead tunes, its been almost a week with shaking completely gone!! . Keep in mind this is a intake, exhaust, tuner truck... and the owner has no interest in going further with it, just wanted a tad more power and. better mileage. What solved the problem? Per gearhead the reasoning for this shake at light throttle is the commanded frp at highway speed, and light throttle and light load is too LOW. The tunes the we received have slightly higher commanded rail pressure then what we've had in the past. I haven't bothered.to ask how much higher. My thought are that maybe these other tuners lowered the commanded pressure at those times to get better mileage (highway cruising) and to be easier on parts... [/QUOTE]

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