Bullydog codes
07-24-2010, 10:02 AM
#1
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Location: snellville, ga
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Bullydog codes
I just bought a 2004 FX4 with 95000 miles. It has a 4" leveling kit and 35" Toyo tires. I have three codes on the bullydog. PO174, system too lean; P0306, cylinder 6 misfire; and P1635, GS: 5 volt reference curcuit. The truck starts and runs great except when I ease on the gas on an upgrade, then it starts misfiring. I took the codes to NAPA who called a mechanic who said it may be the computer has not been programmed to the tires. He said I should take it to a 4X4 shop and have the computer "flashed'.
Anybody familiar with this problem? What should I expect to pay to have the computer flashed?
Anybody familiar with this problem? What should I expect to pay to have the computer flashed?
07-24-2010, 10:13 AM
#2
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I have three codes on the bullydog. PO174, system too lean; P0306, cylinder 6 misfire; and P1635, GS: 5 volt reference curcuit. The truck starts and runs great except when I ease on the gas on an upgrade, then it starts misfiring. I took the codes to NAPA who called a mechanic who said it may be the computer has not been programmed to the tires. He said I should take it to a 4X4 shop and have the computer "flashed'. Anybody familiar with this problem? What should I expect to pay to have the computer flashed?
Swap the COPs on 6 with another plug and see if it changes, if it doesn't probably time for a plug change, check out my stickey at the top of this forum, that should get you started on P0306.
Do you have an aftermarket intake, it could not be playing well with the Bullydog and causing P0174.
07-24-2010, 10:31 AM
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If you have never had the plugs changed, most likely its the plugs. To be honest from what I have heard from many people your lucky to have made it to 95k if you havent changed the plugs before. I had the same code, plus one for Cylinder 8 misfire. When you are driving around 50 or 60 around 1500 rpm, does your truck shake back and forth and feel like its losing power?
09-30-2019, 06:12 PM
#4
Bully Dog Tuner and Misfire
I just bought a 2004 FX4 with 95000 miles. It has a 4" leveling kit and 35" Toyo tires. I have three codes on the bullydog. PO174, system too lean; P0306, cylinder 6 misfire; and P1635, GS: 5 volt reference curcuit. The truck starts and runs great except when I ease on the gas on an upgrade, then it starts misfiring. I took the codes to NAPA who called a mechanic who said it may be the computer has not been programmed to the tires. He said I should take it to a 4X4 shop and have the computer "flashed'.
Anybody familiar with this problem? What should I expect to pay to have the computer flashed?
Anybody familiar with this problem? What should I expect to pay to have the computer flashed?
BTW you ECO BOOST Fans your having a misfire on 3 and 4 most of the times because of the oil build up on the 2 intake valves from the valve cover hose spreading that oil just in cylinder 3 and 4 intake valves instead of spreading it evenly threw out the cylinders to burn it all off.
You have to do a intake cleaning on them valves without trying to replace the head and you can NOT! use sea foam or any other cleaning while the engine is running or you will burn a hole in your turbo because the intake valve remains open on all cylinders as the exhaust valve is wide open to push out all the exhaust of the cylinder and if you use sea foam or any other stuff it is going to swirl back up that intake valve and heat up that turbo too hot!
I got this info from a youtube video from fordmechanic or what ever his name is that has all those repair videos for f150's, im just spreading the word for him.
Last edited by rocxylemmon; 09-30-2019 at 06:23 PM.
