R.E.D Posted October 19, 2013 Share Posted October 19, 2013 hi , my 96 ch613 is not firing .it cranks and starts with starting fluid but it wont stay on.it cranked the day before and when I came in the next morning it cranked but wont start..the lightening bolt in the dash comes on so Im guessing the computer its all right.the injector lines have been bled and still nothing.3 mechanics have come and could not get it going.IF ANYONE HAS ANY INSIGHT PLEASE HELP!! Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/ Share on other sites More sharing options...
hatcity Posted October 20, 2013 Share Posted October 20, 2013 Lightning bolt comes on. What flash code do you get?With cruise control off, press the cruise set button. Watch lightning bolt-it will blink a series of numbers, break, then some more like 7-4.Knowing the blink code can help us better Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-212430 Share on other sites More sharing options...
Dirtymilkman Posted October 20, 2013 Share Posted October 20, 2013 Fuel pump gear Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-212452 Share on other sites More sharing options...
R.E.D Posted October 20, 2013 Author Share Posted October 20, 2013 ok will check this out once I get to the yard in the morning.i hope its nothing serious. its been sitting a week like this already. Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-212533 Share on other sites More sharing options...
R.E.D Posted October 20, 2013 Author Share Posted October 20, 2013 also , one of the mechanics messed it and now the headlights wont turn off.so I have to unplug the batteries to prevent draining (even when I had to recharge them like 5 times this week due to cranking. & the starter has taking a beating too.) Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-212534 Share on other sites More sharing options...
hatcity Posted October 20, 2013 Share Posted October 20, 2013 After reading more from you, I would check batteries FIRST Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-212548 Share on other sites More sharing options...
R.E.D Posted October 20, 2013 Author Share Posted October 20, 2013 Batteries are good. Truck cranks strong when I turn the key. I went to the yard and tried the set button from cruise control and nothing happened. Also could it be the unit pumps and how do I know if my engine has them..? Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-212550 Share on other sites More sharing options...
R.E.D Posted October 23, 2013 Author Share Posted October 23, 2013 hey guys thought I give an update.the engine computer was fried..i plugged in another computer and she fired right up...now looking for a used computer for a 96 427... Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-212951 Share on other sites More sharing options...
Jamkar Posted December 1, 2014 Share Posted December 1, 2014 Any idea why this happens, think we have the same issue. Is there a common problem with the wiring looms shorting out somewhere?95 CHR 375 vmac Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-268789 Share on other sites More sharing options...
Glensts Posted December 1, 2014 Share Posted December 1, 2014 I lost a computer on a 97 mack this year during harvest. Slam it with your hand and it would fire up again. Reader said it was showing 19 volts even though alternator was unhooked. When you slapped it the voltage went to 13.6 then fired up.Searched all over and couldn't find a used computer, new one was $2100 and they shipped it to me, then we drove it to Mack to get programmed as the new one only is programmed enough to get you there, low hp, no cruise, speedo wrong.They said very few ever fail. But the newer ones were $6000 so I guess I will be happy it worked out. Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-268840 Share on other sites More sharing options...
carlotpilot Posted December 1, 2014 Share Posted December 1, 2014 crank shaft position sensor Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-268842 Share on other sites More sharing options...
Keffer inc Posted January 13, 2015 Share Posted January 13, 2015 Crank shaft positioning sensor will only delay firing by a few seconds from my experience. (Loose connection) after working on the truck Quote Link to comment https://www.bigmacktrucks.com/topic/33191-96-ch613-427-cranks-but-wont-start/#findComment-274146 Share on other sites More sharing options...
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