Top-one Posted April 22, 2015 Share Posted April 22, 2015 hello every one,mack truck,yearmfr-2004,engine model-Ac350,hp350,engine can not generate anough power to pull the truck,wastgate actuator on down steady and air supply hose to the wastgate actuator disconnected and does not hold down anymore,stay back in position,what could be the cause? and they are fault code present in dash which i didn't know the root cause,bellow is fault code;5-9(ASET CEGR)MASS FLOW, 5-8(ASET CEGR)EGR TEMPERATURE, 3-5 (ENGINE BRAKE OUTPUT #1), 4-2(FAN CLUTCH OUTPUT),Can all thise code make the truck to loss power both hill&even surface,any help,advise or guide will highly appreciated. Quote Link to comment Share on other sites More sharing options...
41chevy Posted April 22, 2015 Share Posted April 22, 2015 May point you in the correct direction, gives you possible causes for the blink codes. Paulhttp://collision.alldata.com/online2help/techRef/Powertrain_Trouble_Code_Charts/Mack/V-MAC_III.htm Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
Top-one Posted April 30, 2015 Author Share Posted April 30, 2015 Thank very much,this will help me to solve the problem,i am higly greatful. Quote Link to comment Share on other sites More sharing options...
wheeler73 Posted May 2, 2015 Share Posted May 2, 2015 The 5-8 and 5-9 codes are most likely a bad mass flow tube which is common. It comes as a calibrated assembly with a module that bolts behind the EECU. Is the fan clutch staying engaged at all times as this will cause a power loss also. Quote Link to comment Share on other sites More sharing options...
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