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OJ Avery

Porch Pup
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    75
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About OJ Avery

  • Rank
    Old Iron Expert

Profile Information

  • Location
    UPSTATE NY

Previous Fields

  • Make
    MACK
  • Model
    GRANITE
  • Year
    2012

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  1. Update....problem came back. Contacted someone higher up in Mack and had the telematics turned off for this truck.
  2. I always replace the cups with injectors, I don't like doing the job twice
  3. Hey! I was wondering how common a problem is injector leak down causing no start over night on a MP7? I've had it happen 2 times now and the first time I understand. It had OE injectors, ran really good n o codes. Cylinder balance was off a good amount (I don't recall how much) . I replaced the fuel filter head....which did have a sticking check valve. Same problem. We replace a lot of injectors here because of how the equipment is used. So I did the injectors in that one, problem solved. This one I just did is a MP7 also. It had injectors 18 months ago (conical). No start overnight, have to prime it to start it. Cylinder balance was off especially for recent injectors. The difference on the cylinder balance between 5 & 6 was 50. It also showed air in fuel. We went over all fuel lines and connections and all looked good. I finished the injectors and ran it. Shut it off at 2 yesterday and it fired no problem just now.
  4. I have run into this twice recently and both times it was a bad injector. One is sticking open I believe therefore leaking down quickly. Both of the trucks I did, both ran great no drivability issues and no air bubbles indicating cups. There were no injector codes . Cylinder balance test will show it being off some but not really enough to condemn it on that alone.
  5. it is a code for the sim card in the telematics module. The state installed their own gps devices through Verizon. Turns out they weren't playing together nicely. disconnected gps. so far ok. Thanks
  6. I have an odd one I've never seen before. B100409... sim card bad? thoughts??
  7. Having no luck on replacement procedure for the ps1 switch. Winging it
  8. yes, unit has had oil and filters changed. Was in here in June for same code. Looked a little deeper and its a pressure switch. I actually found a ohm value for it when I googled it so I'm going to drop the pan and see what I see.
  9. I'm having trouble locating in the parts manual which solenoid this is. Allison 4500. 13 Mack GU I don't have the breakouts I need to really diagnose it, boss wants to see if just replacing the solenoid will save a trip to the Allison dealer. Thanks!!
  10. previously worked on at a different location, no access to their laptop
  11. ok, so I did the reset, the instructions said to do a regen. Computer said regen was completed. After the regen it derated. Now it has a code for reductant pump a control circuit open ( p208A13)
  12. IDK what the code was, it was cleared when I got to it this morning. I will look for the function parameters reset. Thanks MACKPRO, I'll let you know what I find
  13. I have an odd one. 14 gu712 w/mp7. I'm the 3rd person to work on this so here's the story. Code for def quality. Derate for def quality on the lcd. Sensor was replaced, new def added. Same problem. Not sure what was done by 2nd person. I get it this morning , no codes, derate for def quality on lcd. Cleared lcd warning with the guard dog. Drove for 20 minutes no problems. parked in my bay, off for about 10 minutes. Turn ignition on , lightning bolt and check engine light and def quality derate on lcd all on. after about 5 seconds lightning bolt goes off, a couple seconds later the check engine light goes off. Again I clear the derate message with the guard dog. No codes. I can't find a learned data reset or an acm reset anywhere in ptt. What is going on with this thing? Thanks
  14. We've had a couple of the sensors go bad in Mack granite with mp7. We've also had drivers put washer fluid bin there too. blue cap?? blue (washer) fluid...duh. What a mess
  15. Actually I did pull the connectors apart and pried the connector yesterday. Put it back together and turned on the mirror heat. Then I wiggled the harness at the back of the panel and I could not get it to go off. Thanks for the help turckster!!
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