Krazy_Kvin Posted December 11, 2012 Share Posted December 11, 2012 (edited) Help! I have a 2007 mack cxn613 with the Grey Mack engine in it. The truck was running fine and we had the driver go on vacation for 1 week and when we came back the truck will not start. It cranks hard but will not turn over... When we crank it White Smoke comes out the exhaust. The only Yellow lightning bolt code we are getting is 2-9 which is a humidity sensor. ( i do not believe this would stop it from starting). We have primed the lines and pulled them while cranking to make sure the pump is working correctly. The batteries are all new and the voltage is good. Im Kinda dead in the water with idea's. Does anyone have a Troubleshooting checklist or ideas for this situation?? Edited December 11, 2012 by Krazy_Kvin Quote Link to comment https://www.bigmacktrucks.com/topic/28797-2007-mack-vision-wont-start/ Share on other sites More sharing options...
fjh Posted December 12, 2012 Share Posted December 12, 2012 Make sure you got fuel in the tank s and noone has syphoned it off on you! you might give it a (small) sniff of ether( starting fluid) see if it will light off on that!It sounds like its getting fuel if your geting some smoke!Also have you loosened any fuel lines loosen at least two fuel lines at the head and prime till you get fuel at both then crank they can be real bears to get started sometimes.Once you got two cyls firing the rest will follow up the rear! Quote Link to comment https://www.bigmacktrucks.com/topic/28797-2007-mack-vision-wont-start/#findComment-150724 Share on other sites More sharing options...
Krazy_Kvin Posted December 12, 2012 Author Share Posted December 12, 2012 Im sure we got Fuel. Both tanks are full. And Yes it will start off of Ether. Quote Link to comment https://www.bigmacktrucks.com/topic/28797-2007-mack-vision-wont-start/#findComment-150850 Share on other sites More sharing options...
staxx Posted December 13, 2012 Share Posted December 13, 2012 Need to make sure you have fuel psi while cranking the fuel supply pumps do fail also need to make sure ecu connection is clean the low coolant sensor is bad about leaking coolant into wire harness which then follows down into the engine ecu somtimes cause a no start issue but I would put my money on it being a fuel psi issue. When the pumps fail its the gear that winds up slipping on the shaft . Quote Link to comment https://www.bigmacktrucks.com/topic/28797-2007-mack-vision-wont-start/#findComment-150920 Share on other sites More sharing options...
fjh Posted December 13, 2012 Share Posted December 13, 2012 Does the primer get firm when your priming if not as stax has pointed out the transfer pumps can fail on a moments notice!But you should be able to get it to atleast light off for a second or so, also as stax mentioned pull the plugs on the ecu and check for coolant fairely common issue. Quote Link to comment https://www.bigmacktrucks.com/topic/28797-2007-mack-vision-wont-start/#findComment-150929 Share on other sites More sharing options...
Krazy_Kvin Posted December 20, 2012 Author Share Posted December 20, 2012 Problem Solved! There was a connection box by the ECU that was disfunctional. Replaced it and the truck started right up no problems. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/28797-2007-mack-vision-wont-start/#findComment-152158 Share on other sites More sharing options...
farmer52 Posted December 20, 2012 Share Posted December 20, 2012 Aren't electronics fun? Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/28797-2007-mack-vision-wont-start/#findComment-152175 Share on other sites More sharing options...
ACG Posted March 12, 2016 Share Posted March 12, 2016 I have the same truck. Where is the connection box at? Quote Link to comment https://www.bigmacktrucks.com/topic/28797-2007-mack-vision-wont-start/#findComment-327323 Share on other sites More sharing options...
ACG Posted March 12, 2016 Share Posted March 12, 2016 Can you send me a picture of what it looks like? Quote Link to comment https://www.bigmacktrucks.com/topic/28797-2007-mack-vision-wont-start/#findComment-327324 Share on other sites More sharing options...
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