mackvi Posted June 3, 2008 Share Posted June 3, 2008 My truck is no limits in the rpm, it past to 2300 rpm, when it will be 1800-1900how I can to control it?what tool I need to do itwhere I buy this toolthis truck have engine 350 HP Vmac system.Help me please Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted June 3, 2008 Share Posted June 3, 2008 Take to mack dealer. Quote glenn akers Link to comment Share on other sites More sharing options...
Mackpro Posted June 3, 2008 Share Posted June 3, 2008 The dip switches on the back of the tach could be set wrong and then the tach would be off. Take to a mack dealer and let them plug a ProLink to it a see what the rpms are on the ProLink. If rpms are really 2300 the somethings wrong with the injection pump. Quote Link to comment Share on other sites More sharing options...
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