Markarroyo84 Posted August 24, 2020 Share Posted August 24, 2020 I have an 07 mack pinnacle mp7 couple months ago I had an engine misfire code was 128, 6, 5 so I had the injector replaced ran like a champ until today and the same code for the same injector popped up any ideas or insight of what it could be? Quote Link to comment https://www.bigmacktrucks.com/topic/63869-cylinder-6-misfire/ Share on other sites More sharing options...
41chevy Posted August 24, 2020 Share Posted August 24, 2020 (edited) Mack had problems with the connector terminal heating up and loosening causing a miss, oil eroding the insulation so the the harness will be brittle and the insulation will break off. See if you can locate Mack Service Bulletin SB222017 for diagnostics Edited August 24, 2020 by 41chevy 1 1 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 https://www.bigmacktrucks.com/topic/63869-cylinder-6-misfire/#findComment-459430 Share on other sites More sharing options...
fjh Posted August 24, 2020 Share Posted August 24, 2020 Yup what he said ! Quote Link to comment https://www.bigmacktrucks.com/topic/63869-cylinder-6-misfire/#findComment-459436 Share on other sites More sharing options...
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