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Porch Pup
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About TimberJack

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    Old Iron Expert

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  1. TimberJack

    Injector problems

    2008 CHU MP8. Going through injectors like crazy. You can put a new one in and it might last 3 to 6 months. Could this be a wiring harness problem?
  2. TimberJack

    8-9 code Solenoid Boost Voltage

    It was active, engine seemed to lost a lot of power. Have to drop gears pulling a empty log trailer that I never had to do before.
  3. TimberJack


    Can you start the truck by jumping it on the starter?
  4. 2003 E-tech seemed to lose power and had a skip. Check the codes and had a 8-6 # 6 EUP and a 8-9 Solenoid Boost Voltage. What should I check for the solenoid boost problem?
  5. TimberJack

    Cab for CHU

    I’ve never called the dealer. Figured they would be to high so I’ve been look online for a take off.
  6. TimberJack

    Jake Brakes

    I’ve got a 2004 AC engine sitting in my building and was wondering if the Jakes will work off it on a 2003 E-Tech? Ran across a heck of a deal on a 2003 CH613 and it has no Jakes. Was hoping if I bought it I could use what I had instead of buying a new kit.
  7. TimberJack


    Mine did the same thing. Took it to Mack and they pulled the oil temp plug on the driver side of oil pan and cleaned the oil out of it an it started right up. They told me it was a ground problem from the oil and said I need a new oil temp sensor. They told me the grounds has something to do with the ECM to the starter. Sounds crazy but it fixed my problem. Wished I would’ve knew that before I replaced key switch, starter relay and starter.
  8. I’ve got a 2008 CHU613 that has been turned over. Been looking at cabs, my question is what’s the difference in a CX cab? Will it work on my frame? I’ve noticed in some they say CX set back axle cab.
  9. TimberJack

    Fault code 6-7

    I also changed the module behind the plate in the passenger side floor board.
  10. TimberJack

    Fault code 6-7

    Well I figured out if you start the truck and shut it back off and restart before the dash loses power the code goes away.
  11. TimberJack

    Fault code 6-7

    This is the truck I swapped the AC motor out for a E7. I wonder if that’s what’s causing the 6-7 code?
  12. TimberJack

    Fault code 6-7

    Has anyone had this code? Says power relay, so I changed the 4 power relays in the dash and still nothing. Took the truck to dealership and after $2050 bc the fried the ECM I still left with the same problem.
  13. TimberJack

    2000 CL E7-427 upgrades

    Friend of mine is running the set up I will get the number
  14. TimberJack

    2000 CL E7-427 upgrades

    I’ve been seeing some guy running the stage 2 injectors with a turbo off a 60 series Detroit.

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