John Joseph Degnan Posted March 18, 2014 Share Posted March 18, 2014 my old vecu went bad in my mack 98 r model and truck would not start. I changed it with another one I bought used on ebay and truck started right up but will not go over 30 mph. called dealer and said I need to buy a new one because you cant put a used vecu from another truck because it wont work. they also said they cannot reflash a used vecu. just want some onpinions on this because I talked to ther people who put used vecu's in their macks with no problems. Quote Link to comment https://www.bigmacktrucks.com/topic/35089-vecu-replacement-98-mack/ Share on other sites More sharing options...
Mackpro Posted March 19, 2014 Share Posted March 19, 2014 Is it an ETECH engine? Quote Link to comment https://www.bigmacktrucks.com/topic/35089-vecu-replacement-98-mack/#findComment-238155 Share on other sites More sharing options...
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