<strong>Yahoo Message Number: 100131</strong>Anybody else having trouble with the ISX dropping valves? We bought the unit and drove it 2,600 miles. Engine started running rough about 40 miles from home. Had it towed to Cummins NW. Latest estimate is $31,000 although Cummins is supposed to pick up about $10,000 of it. <br/>This is the second time it's happened, the first was at 19,032 miles,...