T ea7470

Yes the two intake sensors  on the intake manifold were not reading correctly the back one behind the computer had a broken wire also boost tested it and found the intercooler hose was breaking down and blistering  on the inside and boost was seeping out. But. Also another cause of this problem is dickey injectors..

Not a red head and was Australian built.    Has a manual wastegate not electric 

Hi guys new here hoping someone  can help have a 2008 ch688 that keeps throwing a fult

waste gate data intermittent. Now it's doing this when you are coasting with no load on the engine and the intake manifold pressure is low. On a long pull it's fine plenty of boost and not over boosting. Have replace both sensors in the air intake brand new turbo and waste  gate new waste gate hose. New crank and speed sensors  and still no luck. Any clues as where to go next 🤔 mack dealer is stumped  to