dogger Posted June 22, 2013 Share Posted June 22, 2013 motor quit running will not start. got a code of 3-4 timing sensor and 5-4 rack actuator. wondering if timing sensor is bad would that cause 5-4codeany input would be apreciatted Quote Link to comment https://www.bigmacktrucks.com/topic/31666-vmac-2/ Share on other sites More sharing options...
bbigrig Posted June 25, 2013 Share Posted June 25, 2013 Timing event sensor is the sensor that screws into the side of the injection pump.The Rack actuator is internal to the injection pump and will need to have the pump removed from the engine in most cases.The 2 codes can sometimes pop up together if the large grey plug near the injection pump becomes loose or worn causing a bad connection.Check the plug for loose pins or broken wires at that plug harness before you go start replacing the expensive stuff. Quote Link to comment https://www.bigmacktrucks.com/topic/31666-vmac-2/#findComment-190845 Share on other sites More sharing options...
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