Etex1978 Posted September 30 Share Posted September 30 Ive got a 2002 Mack CH600 dumptruck with e7 427 engine. Randomly.....seems more often as of late it will randomly just die while going down the road. Like you turn the key off. Its not a fuel issue Im 100% sure of that. Its something electrical..ive checked and cleaned connections on solenoid, black box nxt to it, ECM plugs,, etc. Scrape/wire brush/contact cleaner. Checked all fuses, nothing has seemed to phase it. One thing that is weird is that sometimes when I go to start it of a morning it you will just hear a click, turn key off back on. Click. Third time it might start up like normal. Might be 1st time. Maybe key switch is bad or ignition......guess thats the same thing. Will randomly die at idle, sometimes all the way, sometimes just die then pick back up. Sometimes going down the road. 90% of the time you can kick it out of gear and turn key off and then recrank, pull back in gear and carry on. Alot of times it will say NO INFO on the display. Left me on the side of the road other day for two hours before it decided to crank up. ALWAYS turns over fine but wont fire. Usually stating NO INFO. Ive read about coolant getting into ecm. That doesnt seem to be an issue. Ive read about solenoid on firewall. Ive read about broken wires/fuses. Ive checked all I know to check. Any help is appreciated. I cant afford for it to be down right now. Quot Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted September 30 Share Posted September 30 I typically go to the grounds in the cab and under the hood for these issues. There is a procedure for a 9-2 code that I posted in another thread this weekend. The thread is about a not start issue.. it is a PDF. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted October 8 Share Posted October 8 “No Info” message on the cluster on thoses years is usually the J1708 or J1939 data link wires shorting in the engine harness. Had 2 in one week doing this and it was shorting wires in the engine harness behind the oil filters . New engine harness solved both theses trucks. Also check the engine ECM connectors for rotted pins due to antifreeze in the engine harness. 1 Quote Link to comment Share on other sites More sharing options...
Etex1978 Posted Monday at 02:02 PM Author Share Posted Monday at 02:02 PM So last week we ran the crap out of this truck! 1st day it did this 6 or 7 times. Die, throw in nuetral, turn key off/on, crank, pull in gear and go. I think I did have to pull off road one or two times. 2nd day it only did it like 3 times.....never had to pull over. Most of the time didnt even have to cycle key. It would just like it glitched out for a second. 3rd day at end of the day it glitched once. 4th day.....not a bobble at all. Its ALWAYS seemed like it had more issue if it sat for a week. If ran ever day it dont have any issues. On 10/8/2024 at 3:37 PM, Mackpro said: “No Info” message on the cluster on thoses years is usually the J1708 or J1939 data link wires shorting in the engine harness. Had 2 in one week doing this and it was shorting wires in the engine harness behind the oil filters . New engine harness solved both theses trucks. Also check the engine ECM connectors for rotted pins due to antifreeze in the engine harness. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted Monday at 02:52 PM Share Posted Monday at 02:52 PM losse grounds?? Quote Link to comment Share on other sites More sharing options...
Mackpro Posted Monday at 04:23 PM Share Posted Monday at 04:23 PM Here is a bulletin on this. https://static.nhtsa.gov/odi/tsbs/2018/MC-10152929-9999.pdf Quote Link to comment Share on other sites More sharing options...
Mackpro Posted Monday at 04:25 PM Share Posted Monday at 04:25 PM On some trucks we saw the starter solinoid shorting internally and making the engine die in a hard pull when the engine would lean over. Quote Link to comment Share on other sites More sharing options...
Etex1978 Posted 12 hours ago Author Share Posted 12 hours ago 21 hours ago, Joey Mack said: losse grounds?? Cleaned the one on the block and left side frame rail. New triple lugs on batterys (pos and neg). Cleaned all posted. Removed ecm plugs and blew out with contact cleaner. New solenoid on firewall and new ground block on firewall. 1 Quote Link to comment Share on other sites More sharing options...
Etex1978 Posted 12 hours ago Author Share Posted 12 hours ago 19 hours ago, Mackpro said: On some trucks we saw the starter solinoid shorting internally and making the engine die in a hard pull when the engine would lean over. Does it mean anything to you that sometimes you can crawl in the truck and hit the key and it wont do anything? Have to turn it to start back and forth several times then it will turn over and crank fine. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted 11 hours ago Share Posted 11 hours ago Acc relay?? Quote Link to comment Share on other sites More sharing options...
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