Jody Scott Posted May 2 Share Posted May 2 Hello, my 2002 CH613 is cutting out and dies while i am driving. I can cycle the key and it will start back up but not an ideal situation in traffic. Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/ Share on other sites More sharing options...
Joey Mack Posted May 2 Share Posted May 2 If it is a total electric cut out. I would look at wiring issues, or even hot relays. They are in the panel on the right in the cab fuse panel.. I should have mentioned the ground connections... Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595382 Share on other sites More sharing options...
Jody Scott Posted May 2 Author Share Posted May 2 I still I have power to the cab, the a/c and lights are operational but the RPM gauge goes straight to zero. Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595383 Share on other sites More sharing options...
Jody Scott Posted May 2 Author Share Posted May 2 I have replaced the transmission the other day and was thinking maybe the RPM sensor on the flywheel housing maybe? Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595384 Share on other sites More sharing options...
Joey Mack Posted May 2 Share Posted May 2 🤔 Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595386 Share on other sites More sharing options...
fjh Posted May 3 Share Posted May 3 15 hours ago, Jody Scott said: I have replaced the transmission the other day and was thinking maybe the RPM sensor on the flywheel housing maybe? Let us know what you find ! The flywheel sensor is a good first step! Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595398 Share on other sites More sharing options...
Joey Mack Posted May 3 Share Posted May 3 I typically post the 9-2 fault code bulletin for this because it is about checking the grounds. 9-2 code.pdf 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595401 Share on other sites More sharing options...
Jody Scott Posted May 3 Author Share Posted May 3 I am getting a 2-4 code and that doesn’t make any sense. Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595403 Share on other sites More sharing options...
Jody Scott Posted May 3 Author Share Posted May 3 My stubborn mind is fighting the ground idea because i live in a dry climate and i did not mess with any grounds/ wires accept the three wire connections on the transmission. I did clean the connections on all the terminals on the batteries and still this bugger is still kicking my tail. The truck ran fine until i messed with it. Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595404 Share on other sites More sharing options...
Jody Scott Posted May 3 Author Share Posted May 3 I ordered and will replace the speed sensor and the flywheel sensor tomorrow and see what that gets me. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595405 Share on other sites More sharing options...
fjh Posted May 3 Share Posted May 3 2 hours ago, Jody Scott said: I ordered and will replace the speed sensor and the flywheel sensor tomorrow and see what that gets me. Good place to start! Test the old one 500 ohms I believe! They also get clutch crap on them! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595415 Share on other sites More sharing options...
Joey Mack Posted May 3 Share Posted May 3 Fjh has a good point, and check the wires on the engine side of the harness. Those wires get abused by the steer tire when it slings dirt, water, and snow. The wires will rot and weaken or just plain break.. Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595416 Share on other sites More sharing options...
Bullheaded Posted May 4 Share Posted May 4 (edited) Check the mass ground post in the dash up by the A-pillar. I had a new 2000 CH with an E7 460 and I used to constantly get the lightning bolt light on the dash and the truck would shut off and restart while driving down the highway. Dealer could never find the problem, they changed harnesses, ECM, etc. Then years later someone on this forum posted about the mass ground point needing to be cleaned and grounded better, and sure enough, that's what the problem was. Edited May 4 by Bullheaded 2 Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595455 Share on other sites More sharing options...
Jody Scott Posted May 4 Author Share Posted May 4 I replaced the speed sensor, and that didn’t fix it, then i went to the flywheel sensor, found some metal dust on the old one and put in the new one. The new flywheel sensor did not fix it. I will follow the advice given and check and clean the electrical connections and let you know what i find. Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595484 Share on other sites More sharing options...
Joey Mack Posted May 4 Share Posted May 4 Did you inspect the (RPM/TDC) flywheel sensor wires for damage? On the truck side, not the sensor wires. Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-595485 Share on other sites More sharing options...
Jody Scott Posted 10 hours ago Author Share Posted 10 hours ago Update, i changed the sensors and they did not fix the problem. Humility set in and i checked, cleaned, and lubricated all electrical connections in the engine/ firewall i could find, went into the cab on the passenger side fuse and relay area i found a ground wire that was loose, i tightened it and the problem is gone. The part that really stings me is these wires haven’t been touched in a year and out of the blue it shorts out and sends me on the expensive goose chase. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-596129 Share on other sites More sharing options...
fjh Posted 1 hour ago Share Posted 1 hour ago So there is something that happend when these first came out I will mention! Disconnect the alternator for awhile and see if the issue goes away! The ecm is vulnerable to Voltage spikes If the alt is spiking the engine will shut down! just a thing to check for! We had one that did this very thing! We sent a service asist to Mack! They were able to duplicate the issue on a dyno for us! They also found it by accident The teck spotted it out of the corner of his eye while running it up! real far out there fix but shit happens! check the alt connections ect! Something to try! Quote Link to comment https://www.bigmacktrucks.com/topic/76619-my-2002-mack-ch613-engine-is-skipping-and-shutting-off-while-i-am-driving/#findComment-596152 Share on other sites More sharing options...
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