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OJ Avery

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About OJ Avery

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    Truck Nut

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  1. OJ Avery

    oil in harness

    So you still do the harness and the updated oil pressure switches I assume.
  2. OJ Avery

    oil in harness

    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.
  3. OJ Avery

    A/C compressor

    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
  4. OJ Avery

    MP8 still sucks at life

    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.
  5. OJ Avery

    weird codes

    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
  6. OJ Avery

    mp7 code spn 105

    ok thanks mackpro
  7. OJ Avery

    mp7 code spn 105

    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.
  8. OJ Avery

    mp7 code spn 105

    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!!
  9. OJ Avery

    MP7 looses its prime

    The MP8 would have been a much better application here, but when you work for the state......
  10. OJ Avery

    MP7 looses its prime

    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.
  11. OJ Avery

    MP7 looses its prime

    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.
  12. OJ Avery

    MP7 looses its prime

    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
  13. OJ Avery

    MP7 looses its prime

    Thanks fjh, I was looking for confirmation, just so low miles, a little hard to believe.
  14. OJ Avery

    Regen issue

    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.
  15. OJ Avery

    Injector problems

    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' .

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