1965 Posted September 4, 2016 Share Posted September 4, 2016 On September 2, 2016 at 8:36 PM, Keffer inc said: how was your truck running before you did injectors? I'm thinking mine may be bad now instead of a boost issue. No matter what gear or loaded/unloaded, about 1,500 RPM is when it starts to shake and loose power. Feels like a misfire, Fuel is what makes the boost; when i r&r the injecters it made it seem like it had the 505hp; it will pull bury the needle now 40psi Quote Link to comment https://www.bigmacktrucks.com/topic/45927-mp8-boost-pressure-dtcs/page/2/#findComment-344517 Share on other sites More sharing options...
Eric copper Posted April 23, 2020 Share Posted April 23, 2020 I have a 2008 mp8, turbo hits 1100 degrees and only makes 20 to 22 pounds of boost. I have replaced the injectors and cups, new turbo, new sensor. and no leaks.?????????????????????????????????????? Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Quote Link to comment https://www.bigmacktrucks.com/topic/45927-mp8-boost-pressure-dtcs/page/2/#findComment-449511 Share on other sites More sharing options...
fjh Posted April 23, 2020 Share Posted April 23, 2020 (edited) as much as the above statment is some what true have you checked for boost leaks? your pyro is to way high! Edited April 23, 2020 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/45927-mp8-boost-pressure-dtcs/page/2/#findComment-449539 Share on other sites More sharing options...
mp8_macky Posted May 3, 2020 Share Posted May 3, 2020 i agree on boost leaks. those manifold know to crack around bolts holding them. do pressure test and check it visually for any cracks. also what you guys should do from time to time is cleaning the boost pressure sensor, if the truck is not deleted it will even require this cleaning more often. Quote Link to comment https://www.bigmacktrucks.com/topic/45927-mp8-boost-pressure-dtcs/page/2/#findComment-450248 Share on other sites More sharing options...
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