Zeuz Posted May 21 Share Posted May 21 Hello...I was wondering if anyone can help me with my issue..I got a 2013 Mack with a Mp8, The truck wouldn't start so I took it to the dealer they told me the computer and cluster where bad,I replaced them both because they said they couldn't cause it's deleted,when I replaced them it started perfect ,but after a couple of days it won't start through the key...it has a solenoid on starter and a smaller one.both wires on smaller solenoid are hot and doesn't make any difference if key switch is on or off,truck been sitting up for a couple of months can't find anyone who can figure it out.Has a brand new starter too. Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/ Share on other sites More sharing options...
Joey Mack Posted May 21 Share Posted May 21 is this a cranks but wont start,,, or a ,, it does not turn over? Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552221 Share on other sites More sharing options...
Zeuz Posted May 21 Author Share Posted May 21 Doesn't turn over ,if I put ground to the little solenoid it turns over Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552222 Share on other sites More sharing options...
Joey Mack Posted May 21 Share Posted May 21 will it start with the key in the 'ON' position? is it wired up correctly, one of the wires has a red band on it.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552223 Share on other sites More sharing options...
Zeuz Posted May 21 Author Share Posted May 21 Yes it's wired correct,my understanding is that there is 2 hot wires on smaller solenoid then you turn key switch forward it sends ground ,but it's not sending ground.and I really hadn't tried starting it from the starter with the switch on.mechanic told me today computer is bad ,I just put it a month ago Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552224 Share on other sites More sharing options...
Joey Mack Posted May 21 Share Posted May 21 well, deleted trucks cause lots of issues, do you have one of those hand held push buttons to clip to the starter? then turn the key on and see if it fires up. Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552226 Share on other sites More sharing options...
Zeuz Posted May 22 Author Share Posted May 22 Yes I do but I hadn't tried it ,I took it to the mechanic but I'm going to pick it up tomm.could I by bypass the switch and just put a push button ? Or will the ECM not let it? Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552230 Share on other sites More sharing options...
The Rubber Duck 006 Posted May 22 Share Posted May 22 29 minutes ago, Joey Mack said: well, deleted trucks cause lots of issues, do you have one of those hand held push buttons to clip to the starter? then turn the key on and see if it fires up. Almost sounds like the Solenoid may be broken inside maybe?? Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552231 Share on other sites More sharing options...
Joey Mack Posted May 22 Share Posted May 22 I may be jumping too far ahead, but I got a 2009 that was deleted, to start and run right by using a starter button. the 39 MT starter in your truck is pretty good, the little space ship celenoid that is bolted to it can fail, but I think you said yours is new. I am not very smart about deleted DPF/DEF trucks, so I wont be much help... Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552234 Share on other sites More sharing options...
Zeuz Posted May 22 Author Share Posted May 22 3 minutes ago, Joey Mack said: I may be jumping too far ahead, but I got a 2009 that was deleted, to start and run right by using a starter button. the 39 MT starter in your truck is pretty good, the little space ship celenoid that is bolted to it can fail, but I think you said yours is new. I am not very smart about deleted DPF/DEF trucks, so I wont be much help... Yes I put brand new starter from Mack and 2000.00 dollar cluster and put a new ECM.it started fine when installed but after a few days same crap it had before.. Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552236 Share on other sites More sharing options...
Zeuz Posted May 22 Author Share Posted May 22 Every once in awhile it would start but I hadn't had luck lately.i was able to go the next day it would start I shut it off tried it again and nothing . Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552238 Share on other sites More sharing options...
Joey Mack Posted May 22 Share Posted May 22 I dont know what to tell you Bud,,, dont know why the truck is deleted, the G-Men made truck builders put big issues in the ECM's if they get deleted, so that you would get it in the A$$ when all you want to do is make a living. Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552239 Share on other sites More sharing options...
Zeuz Posted May 22 Author Share Posted May 22 1 minute ago, Joey Mack said: I dont know what to tell you Bud,,, dont know why the truck is deleted, the G-Men made truck builders put big issues in the ECM's if they get deleted, so that you would get it in the A$$ when all you want to do is make a living. Thanks ..I bought the truck deleted I have 7 macks and all deleted 😂 and 1 international with a maxxfoce 😂 Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552240 Share on other sites More sharing options...
Joey Mack Posted May 22 Share Posted May 22 God Bless You !!! I really hope this one gets back to work.. Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552241 Share on other sites More sharing options...
Joey Mack Posted May 22 Share Posted May 22 are all the Macks CXU's? Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552242 Share on other sites More sharing options...
Zeuz Posted May 22 Author Share Posted May 22 4 minutes ago, Joey Mack said: are all the Macks CXU's? 6 cxu with mp8 and 1 2005 with a e7 engine 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552243 Share on other sites More sharing options...
Joey Mack Posted May 22 Share Posted May 22 is the 07' a CHN? Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552244 Share on other sites More sharing options...
Zeuz Posted May 22 Author Share Posted May 22 9 minutes ago, Joey Mack said: is the 07' a CHN? It's a 05; chu 613 18 speed 46,000 rears 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552245 Share on other sites More sharing options...
mechohaulic Posted May 22 Share Posted May 22 can't contribute much here; too new for me . question I do have is (based on old school) why are both wires on small solenoid hot ?? 39 MT another question . were they not 45 ?MT's just so many letters/ numbers in today's iron. prices ??? unheard of . keep going Jo jo, it's late but learning for me has no time schedule Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552251 Share on other sites More sharing options...
Joey Mack Posted May 22 Share Posted May 22 Im in bed, trying to figure out how to post pictures with my new phone in sidetrack thread. Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552256 Share on other sites More sharing options...
mechohaulic Posted May 22 Share Posted May 22 5 minutes ago, Joey Mack said: Im in bed, trying to figure out how to post pictures with my new phone in sidetrack thread. now it's time to say good night to all our company!! M I C K E Y M O U S E . you young folk HAVE to shut the mechanics down ; came close to throwing trailer owner out of shop today == his son had sports practice. I said " don't do what I did and put work first" . he text me thanking me , his son was over joyed Dad showed up. point is SIR put the phone down go to sleep. 😄 Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552258 Share on other sites More sharing options...
The Rubber Duck 006 Posted May 22 Share Posted May 22 Is the solenoid new? Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552275 Share on other sites More sharing options...
Zeuz Posted May 22 Author Share Posted May 22 2 hours ago, The Rubber Duck 006 said: Is the solenoid new? Yes it's new ,starter,cluster and ECM. Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552287 Share on other sites More sharing options...
The Rubber Duck 006 Posted May 22 Share Posted May 22 1 hour ago, Zeuz said: Yes it's new ,starter,cluster and ECM. Hmmm it almost Sounds like the Solenoid is damaged or the terminal may be broken inside not allowing it to make contact or allowing it to until it gits hot....Not sure with out it being in front of me.... Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552301 Share on other sites More sharing options...
Joey Mack Posted May 22 Share Posted May 22 Has anyone tried to see of power goes to the celenoid while someone trys to start it? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74174-mp8-wont-start/#findComment-552302 Share on other sites More sharing options...
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