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OJ Avery

Porch Pup
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Everything posted by OJ Avery

  1. The mirror motor works as it should. Checked powers and ground. not always understanding the circuit. The circuit goes thru the instrument cluster module. Wondering if that's the issue??
  2. I have an odd one. I'm doing a mirror upgrade for our plow trucks that use a tow plow. Swapping the right stationary mirror for a motorized one. Both left and right mirrors heated of course. The heated mirrors won't operate. I unplugged both to see if the switch would light and it did....1 time. I pulled up the wiring diagram and everything I see is checking out. I have power to the switch at #2. When I press the switch #4 terminal lights like it should. I swapped the relay with another one with exact part number. The HTD mirror fuse at f15 is good. I replaced the switch just because I have one. Any help would be appreciated.
  3. OTC makes a kit that works great for testing for air...OTC p/n 88800236...I use it often
  4. So everything seemed to go well until last week. I heard from the residency mechanic that when its got a full load it shifts hard 1-2 and there's a code for a solenoid. Haven't seen the truck yet, will keep you updated. Thanks for all your efforts, I appreciate you all!!
  5. I'm having troubles locating Allison service bulletins, specifically Allison sil 18-TR-98 Any help would be appreciated
  6. Thanks BC Mack and Mack Pro. I contemplated sending the cooler out for pressure testing because even though I didn't know what the pressure at the cooler typically was, I knew I wouldn't be able to simulate it. But I went with a new cooler. Second try of course. I ordered everything before I took it apart, I ordered a 7 plate and this has a 17 plate cooler. Yes the cooler is below the output shaft. We've started servicing the Allison's here, and typically anything more than that we send to a Allison dealer, but I figured this wasn't a complicated process so we decided to keep the truck here. We have a couple hundred 13-15 Mack GU with the Allison and we've experienced very few problems. Thanks again , I can always count on both of you to help out.
  7. Hello??..is this thing on lol?? another question, I am having no luck finding any literature on this thing. I pulled the cooler and put it in the parts washer tank and put about 30# of air to it , no leaks. what is the typical pressure running through the cooler??
  8. I have a 13 GU with a 3000/4000 series ( I think ) Allison in it. Serial # 6610336363, cooling system is full of trans fluid so my assumption is the cooler is bad. its an internal one on the back of the trans. I'm not finding much literature on it so any help would be greatly appreciated. Is it as straight forward as the parts diagram shows? Do's and don'ts ? Thanks!!
  9. So you still do the harness and the updated oil pressure switches I assume.
  10. Did I see on here that Mack says no longer replace ecm with an oil soaked harness? It has reached the ecm. Working on a 2009 mp7 w/ 07 emissions.
  11. I am replacing an a/c compressor on a13 granite and I can not find anything in impact about r & r. How much oil goes in before install, ect
  12. injector cups. if you do a cylinder balance test you'll see a couple injectors out of wack. I've had a few no code injector probs. It will clog the dpf quick or be doing regens (or at least trying) often.
  13. I have a 13 GU with a mp7 and I had some unuasual codes. we also run a Verizon gps system off the diagnostic connector. codes..spn 251 fmi 12...spn 171 fmi 9...spn 2017 fmi 9...spn2029 fmi 9...spn228 fmi9...spn245 fmi9..spn251 fmi 9,2,13spn 3695 fmi9..spn 641fmi4 spn 84 fmi9 ..spn 91 fmi 9... what do you make of this? I feel they are all related to a common incident
  14. I also have a pending code spn 3226 fmi13 after treatment nox cal value out of range... I cannot get nox sensor values in ptt, why? Ive looked at every test in ptt.
  15. I have a 12 mp7 in a granite that I keep getting an intake manifold temp sensor code. Occasionally its active. The sensor has been replaced as well as the engine wire harness. Checked my connections and grounds, all good. I took a temp reading on the manifold, 110 and the ptt gave me 124. Thoughts?? Thankyou!!
  16. The MP8 would have been a much better application here, but when you work for the state......
  17. It is a shame. we have an 08 tractor that is mainly over the road and that truck has 225000 on it now with oe injectors. How they get used makes a huge difference.
  18. I did the injectors and it doesn't lose its prime overnight. Thanks for the input guys, I really appreciate it. This forum is gold to me as I work on DOT trucks with little factory training. We've been given a decent supply of specialty tools so doing all repairs is possible but a little short on diagnostics. We've been using the graphite paste on all our injector jobs. We do probably more than average amount of injectors because of the truck use. They're plow trucks so they're over loaded with iron and salt and usually travel about 35-40 mph. we don't usually see a set go past 100,000 miles.
  19. injectors are out, 2 of them show significantly more carbon than the rest. That's just a lot of $ for so little miles. Glad its not mine
  20. Thanks fjh, I was looking for confirmation, just so low miles, a little hard to believe.
  21. The 07 emission mp7 we usually see higher temps than that. 2010 emissions those temps are good. I'd say its not getting fuel to the 7th inj or the 7th injector itself.
  22. We've experienced that the connector at the injector gets worn or the wiring becomes brittle from heat. Mack makes a replacement pigtail. Be sure to use oil/heat resistant heat shrink tubing. We've also done complete harness' .
  23. I have a 2012 with a mp7 2010 emissions (spark assist) the problem I'm having is it looses its fuel prime over the weekend, sometimes overnight. I replaced the fuel filter head and filters, one check ball was sticking. Still did it. Replaced the "pressure regulator" on the return side on top of the head, still did it. Did an air in fuel test and it looked great. Did a warm hold function, that was good torque was 60ft# at idle. Did a cylinder balance test and #2 was off the most (+23), #6 was next at -20, # 3 -19. This vehicle only has 37k on it. But its a paint truck, really heavy and really slow driving. Do I have an injector leaking down causing it to loose its prime?
  24. Soooo, been awhile. That unit did end up needing injectors. I did a power balance test and it showed cyl 1 and 4 being off. so when I pulled injectors 3 and 6 were really carboned . as far as the ambient air temp I found the wiring to be ok. we've experienced in the past weird issues with our Verizon gps unit that hooks right into our diagnostic port, so I unplugged that for now.
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