randalhenry Posted July 7, 2014 Share Posted July 7, 2014 I have been experiencing intake manifold problems and this has been causing damage to emssion hose and power issues intermittly Quote Dogly Link to comment https://www.bigmacktrucks.com/topic/36279-mp7-air-intake-manifold-pressure-erratic-power-loss/ Share on other sites More sharing options...
wheeler73 Posted July 8, 2014 Share Posted July 8, 2014 The boost pressure sensors do go bad. Also the intake manifolds crack and break mounting bolts. Also check the charge air cooler and hoses for leaks. Quote Link to comment https://www.bigmacktrucks.com/topic/36279-mp7-air-intake-manifold-pressure-erratic-power-loss/#findComment-252146 Share on other sites More sharing options...
randalhenry Posted July 8, 2014 Author Share Posted July 8, 2014 Hi wheelerI have checked all hoses found small leak on turbo pipe flex line replaced it I have a sensor shows the placement is under ECM Still trying to locate Any hints Quote Dogly Link to comment https://www.bigmacktrucks.com/topic/36279-mp7-air-intake-manifold-pressure-erratic-power-loss/#findComment-252185 Share on other sites More sharing options...
wheeler73 Posted July 9, 2014 Share Posted July 9, 2014 The boost pressure sensor should be in the intake manifold on the top side between #4 cylinders. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/36279-mp7-air-intake-manifold-pressure-erratic-power-loss/#findComment-252248 Share on other sites More sharing options...
wheeler73 Posted July 9, 2014 Share Posted July 9, 2014 What year is the truck? Quote Link to comment https://www.bigmacktrucks.com/topic/36279-mp7-air-intake-manifold-pressure-erratic-power-loss/#findComment-252249 Share on other sites More sharing options...
randalhenry Posted July 9, 2014 Author Share Posted July 9, 2014 Hi WheelerTruck is 06. I did locate the sensor. It was on the left side where u mention. ThanksIt will go back on the road on Friday just need to some minor ac repairs.I will let you how it performs under load.ThanksDogly Quote Dogly Link to comment https://www.bigmacktrucks.com/topic/36279-mp7-air-intake-manifold-pressure-erratic-power-loss/#findComment-252344 Share on other sites More sharing options...
wheeler73 Posted July 10, 2014 Share Posted July 10, 2014 Thanks for keeping us updated. Quote Link to comment https://www.bigmacktrucks.com/topic/36279-mp7-air-intake-manifold-pressure-erratic-power-loss/#findComment-252379 Share on other sites More sharing options...
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