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OJ Avery

Porch Pup
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Everything posted by OJ Avery

  1. I'm a state worker (NYSDOT).... I get paid by the year lol
  2. Funny story... (NOT!!!) after replacing fuel filter head twice, replacing every fuel line, bypassing the heater, I come to find out someone at another location started the job, decided it was too much for their field location, slapped it back together and guess ...what it wouldn't run. They don't care its getting shipped off, not their problem anymore. I had no idea someone was already there. 2 lines got switched. I spent 66 hours on this ....SMH
  3. Replaced mechanical pump, nothing. Put another filter head on it nothing. Replaced the line from the filter head to the back of the head (feed line) nothing. Filled the tank to the very top to check pickup, nothing. I'm going to do the feed and return from the tank now. The feed goes to a heater that's located in the frame rail by the trans.
  4. Got it to barely run at about 22# of air to the tank. I haven't ever seen a mechanical pump go bad.
  5. yeah, 300 pumps nothing. So i put some psi to the tank (20#) and it'll almost catch. I crack the return line at the front of the head and there's plenty of fuel there. But still no resistance at the primer.
  6. yeah its got a primer, i dont know if ive gone 200 pumps but i feel like ive had to be close to that. Do you feel no prime at all for the first 190 pumps?
  7. Hi all. I have an issue with a 12 mp7 10 emissions. Its a NYS DOT truck which is in a lot of salt. The fuel filter housing had rotted away and the cooler ends were barely there. I replaced most of the lines going to the filter head. I can not get it to prime!! I took the feed hose from the tank off, blew it out both ways, still can't get it to prime. What gives
  8. Thanks JoeH, I believe we have the correct rod here in the shop and I've googled techniques, so I'll take a swing at it later today. I was hoping it has been an issue for others and there was a solution to the problem. this isn't the first one I've encountered
  9. OJ Avery


    the harness is all one piece. a little seepage out of that hole isn't a big concern. If you wanted to replace the o ring you'd have to remove the valve cover and unplug the injectors and engine brake. If you do go down that road be very careful with the injector connection, the wires get brittle.
  10. Anyone run into this?? This is a abs sensor mount for a rear axle. Truck is an 11 gu713. It rotted off from salt exposure. Is there a repair kit? or do I just go talk to the guy who has done "some" cast welding
  11. Turckster, I have watched techs here do the same thing. They've done one set and don't think they need to look at procedures any more. I just did a set that was 18 months old, maybe 15,000 miles. Had air in fuel bad and leak down/no start over night.
  12. Update....problem came back. Contacted someone higher up in Mack and had the telematics turned off for this truck.
  13. I always replace the cups with injectors, I don't like doing the job twice
  14. 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.
  15. 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.
  16. 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
  17. I have an odd one I've never seen before. B100409... sim card bad? thoughts??
  18. Having no luck on replacement procedure for the ps1 switch. Winging it
  19. 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.
  20. 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!!
  21. previously worked on at a different location, no access to their laptop
  22. 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)
  23. 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
  24. 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
  25. 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
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