worellana88 Posted May 3, 2021 Share Posted May 3, 2021 On 7/20/2017 at 10:42 AM, Jbush_51 said: Will do. It's in its phase of running fine at the moment but I'm sure it will start acting up in a couple weeks. I got the same issue. 07 granite mp7 shuts off out of nowhere. Switch key off and reset cranks right up. Sometimes take a minute. I hear the turbo make a noise when it's ready to fire up. Mack told me it was the engine brake valve and I didn't believe but changed that and the engine harness anyway. No luck still shuts off. Now I'm just dealing with it. I'm thinking egr but I'm no mechanic. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted May 3, 2021 Share Posted May 3, 2021 Has any thing been done to the cam and flywheel sensors.? arent they both at the rear and have the same plug? what codes do you have? I assume fluids are up... I wish I was more fluent in Swedish, Jojo Quote Link to comment Share on other sites More sharing options...
Tedds Fixit LLC Posted August 2, 2021 Share Posted August 2, 2021 Intermittent or random shutdown. U’re wasting money on changing parts like accessory relay or fuel solenoid, clutch fan assembly. This is where the problem is at. Go to the drivers side firewall, above the foot brake valve there are two wire harness. That supply power to all these parts. Remove the coupler and check the pins for good connections and corrosion. Inspect the backs of the couplers. This will solve u’re issue. Teddd Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted August 4, 2021 Share Posted August 4, 2021 any luck? if its fixed, post the fix... jojo Quote Link to comment Share on other sites More sharing options...
Tedds Fixit LLC Posted August 11, 2021 Share Posted August 11, 2021 I have replaced engine side wiring harness on a few trucks with intermittent shut down. It cured the problem. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted August 11, 2021 Share Posted August 11, 2021 Just asking because its been a while since I fixed a volvo/mp, engine, Is that the short harness for the oil pan sensors, or was it the whole harness that goes behind the engine with the cam sensor plugs that can be mixed up because they are the same? I'm rusty, I have only done about 5, MP harness' and it's been 4 years since the last one, on an MP-7 that i pulled out to do major work too. .just like to know in case I need to help someone who may call on my services..... thanks, jojo Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted August 11, 2021 Share Posted August 11, 2021 I just read some old posts on this, and I may have missunderstood, I thought this was about an MP, but the post title is E-7... I'm sorry,,, jojo Quote Link to comment Share on other sites More sharing options...
Burke2020 Posted September 1, 2021 Share Posted September 1, 2021 DO NOT FORGET TO DISCONNECT THE NEGATIVE BATTERY TERMINAL ON ALL BATTERIES BEFORE DOING THIS. I had the same problem today. it was the connection at the Cab computer behind the metal plate under the HVAC fan and ductwork. cleaned the male and female connection with battery cleaner and a wire brush, put a slight bend on each male connection. Back Trucking. DO NOT FORGET TO DISCONNECT THE NEGATIVE BATTERY TERMINAL ON ALL BATTERIES BEFORE DOING THIS. Quote Link to comment Share on other sites More sharing options...
Burke2020 Posted October 9, 2021 Share Posted October 9, 2021 (edited) After looking into some of my wire looms and the understanding that it was shutting off fuel, mine was a leaking oil pressure sensor. Once the oil got warm and flowing it would leak faster out of the oil pressure sensor plug/connection Edited October 9, 2021 by Burke2020 more info Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted October 9, 2021 Share Posted October 9, 2021 did Tedds confirmed cause turn ot to be the problem? It would be good to have the repair posted for future users... thank's Jojo Quote Link to comment Share on other sites More sharing options...
Ima Posted February 3, 2022 Share Posted February 3, 2022 (edited) Hello guys, I need a little bit of help I have a 2013 Mack pinnacle with mp8 engine, trucks was running fine I had a dpf deleted 3 weeks ago and now the truck start shutdown on my while it’s driving RPM get down to idle and gas pedal will not respond turn the keyswitch off and it don’t kill the engine, it remain in idle until the truck is completed parked and speedometer reached “0” and engine shutdown it self turn the keep off and on and truck work fine for 15 o 20 minutes and same problem happen again I disconnected speed sensor when for a run and it just completed shutdown the engine on my since speedometer was on “0” all the time, reset the keys and y runs fine agains Only code on Ecm Mid 140, ppid 278 fmi 9 mid 144 psid 40 fmi 4 One time it show mid 144 psid 230 fmi 5 Edited February 3, 2022 by Ima Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted February 3, 2022 Share Posted February 3, 2022 No delete's..... these computers are too smart... Sorry, Jojo 1 Quote Link to comment Share on other sites More sharing options...
Ima Posted February 3, 2022 Share Posted February 3, 2022 8 minutes ago, Joey Mack said: No delete's..... these computers are too smart... Sorry, Jojo I had seen few Mack with deleted and they worked fine even better than before Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted February 3, 2022 Share Posted February 3, 2022 (edited) 25 minutes ago, Ima said: I had seen few Mack with deleted and they worked fine even better than before I guess you weren’t one of the lucky ones…eventually something goes very wrong with them. Edited February 3, 2022 by Onyx610 Quote Link to comment Share on other sites More sharing options...
CV713 Dump truck Posted March 4, 2022 Share Posted March 4, 2022 I have a 2006 CV 713 dump truck with AMI 370 engine. When on a rough road it will shut down everything. I can cut the key switch off and it will crank right back up and going. It gives a 9-2 code, which is power reset without key switch. It started about a year ago occasional. Now it is occurring several times a day. I have checked the grounds from the starter to engine block and to frame rail. What is the next step? Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted March 4, 2022 Share Posted March 4, 2022 https://f01.justanswer.com/HeavyEquipmentTech/08b3b0a9-699e-422a-b834-ba684bc06d37_Mack_fault_9-2.pdf Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted March 4, 2022 Share Posted March 4, 2022 there are grounds behind the cluster to the left, and next to the fuse panel on the right side, there is also a ground breaker on the fire wall next to the starter relay, it is black and just has ground wires on it.. The accessory relay in this model should be a square relay in the right fuse panel.. I cant remember the number.. jojo 2 Quote Link to comment Share on other sites More sharing options...
CV713 Dump truck Posted March 4, 2022 Share Posted March 4, 2022 jojo, is the ground breaker and starter relay on the fire wall below the windshield wiper motor? Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted March 4, 2022 Share Posted March 4, 2022 yes Quote Link to comment Share on other sites More sharing options...
CV713 Dump truck Posted March 6, 2022 Share Posted March 6, 2022 Can the ground breaker go bad? Causing disconnect on rough roads. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted March 6, 2022 Share Posted March 6, 2022 (edited) yes.. to test/prove it un hook 1 side of it and try to start the truck... jojo Edited March 6, 2022 by Joey Mack More content needed Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted March 6, 2022 Share Posted March 6, 2022 BTW,,, if you do unscrew one of the post's and it crumbles.... you found a problem..... Good luck Sir. jojo Quote Link to comment Share on other sites More sharing options...
Mack log truck Posted March 7, 2022 Share Posted March 7, 2022 On 3/4/2022 at 6:47 PM, Joey Mack said: yes Jojo, the starter relay is just a 3 post intermittent 12v relay you can buy at an auto parts store or should it have specific specs? Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted March 7, 2022 Share Posted March 7, 2022 Napa is fine, just pay attention to Amperage 👍 Quote Link to comment Share on other sites More sharing options...
CV713 Dump truck Posted March 12, 2022 Share Posted March 12, 2022 jojo, I removed the single wire on one side of the ground breaker. The truck cranked right up. Should it not have cranked? Quote Link to comment Share on other sites More sharing options...
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