OldRedMack Posted April 11, 2020 Share Posted April 11, 2020 Did you change the eup that was throwing a code? I had no codes for a weak eup and never would have known if I didn't install new injectors and developed a skip. Quote Link to comment Share on other sites More sharing options...
OldRedMack Posted April 11, 2020 Share Posted April 11, 2020 If I remember right, I think mack tech posted a few years back that mike at K&S figures the optimal life span of those injectors at 5k hours. Or was that just for the AI engines. Quote Link to comment Share on other sites More sharing options...
Mack Technician Posted April 11, 2020 Share Posted April 11, 2020 (edited) 1 hour ago, OldRedMack said: If I remember right, I think mack tech posted a few years back that mike at K&S figures the optimal life span of those injectors at 5k hours. Or was that just for the AI engines. AI/AC spend injectors. I think 5K is more the General rule than the exception for just Mike’s. Some of the other guys may have a different view, but I think Mack expected longer life and that’s why they made Davco water separator units mandatory install on the new trucks. Mack blamed short life on water.......separators never had water in them. Multi-hit, CCRS injection was the cause. Edited April 11, 2020 by Mack Technician Quote Link to comment Share on other sites More sharing options...
Dar Posted April 11, 2020 Author Share Posted April 11, 2020 Yes I changed it. Code cleared after and engine idled smooth after. But otherwise no difference. Quote Link to comment Share on other sites More sharing options...
Phildeez Posted July 27, 2020 Share Posted July 27, 2020 ever find the solution? Quote Link to comment Share on other sites More sharing options...
Ron Fulton Posted August 1, 2022 Share Posted August 1, 2022 Vehicle speed sensor has failed. It is sending false info to engine computer causing derate. Quote Link to comment Share on other sites More sharing options...
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