Customer Questions and Answers

Customer Questions and Answers:

Question:  My tuner is coming up with code 0A000139.

I have egr delete and dpf delete.

Tried running truck for 15 seconds and then reinstalling the maintenance mode, but the code keeps popping up. Any help would be appreciated.

Answer:  This code is saying “Download to truck failed.”   Make sure the battery voltage is up and stable.  Make sure there are no other devices connected to the truck and everything is powered off.  If the problem continues call Gear Box Z.

Phone: 877-217-1911

 Question:  I have a 2008 Ford F-350 I am using the standard gearbox z tuner gbz-fd40 for this truck with a dpf maintenance mode. I performed a complete EGR maintenance and I have a check engine light concerning the egr valve/system. I concluded from the website the product will work with dpf/egr maintenance mode without a check engine light? Will it work or do I need a different product/download? Your help in this matter is greatly appreciated!

Answer:  You will need to remove the temperature sensor from the EGR cooler, insulate and reconnect it to the truck, then secure it to the wire harness.

 Question:  Hello l have a 2008 F250 Diesel I would like to know if I could run a test pipe only, no tune.   Thank U

Answer:  If you do not run a tune that stops the regen cycle the DPF filter will plug off and shut down.

Question:  looking to buy 5'' exhaust system and egr deleat kit for a 2010 f250 power stroke with 6.4 would like some info and pricing.

Answer:  www. GearBoxZ.comPhone:877-217-1911


Question:  Good Morning, We purchased a GBZ-FD40 on 11/15/16 and installed it on a 2008 Ford 6.4. We purchased this so it would not code for the deleted EGR. It is still coding is there an update that I need to do, or what ideas do you have for me. Thank you for your help.

 Answer:  For the GBZ-FD40 turn off the EGR system and the DPF sytem.  If you get a code for EGR temperature sensor, remove the sensor from the EGR cooler.  Insulate the sensor and connect it back into the circuit, then secure the sensor to the wire harness.

 Question:  I purchased the DPFmaintenance power plus70 from your site and took the egr valve and coolers and the dpf exhaust off my 08 f350. After putting new exhaust sections on and the egr maintenace mode kit I installed the system on the truck. Seems to run great other than my idle is now at nearly 1000 RPMs all the time hot or cold engine. Is the nearly 1000 RPM normal with your system? Truck use to idle just below 750 when it was warm and high idled 1100 when it was cold. Any info would be helpful.

Answer: The exhaust Gas Temperature sensors need to be removed from the DPF filter, insulated and reconnected to the truck.  Just secure the


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