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JP02XLT
Member
- Joined
- Nov 23, 2008
- Messages
- 466
- Reaction score
- 8
- Points
- 18
- Location
- Indiana
- Vehicle Year
- 02
- Make / Model
- Ranger
- Engine Size
- 3.0
- Transmission
- Automatic
For months I have chased the random 0171 & 0174 codes, it was so random that it was hard to figure out the common denominator that set the code, even with very good notes & data on when the codes set.
I had used propane, smoke machine, stethoscope & anything else I could think of to trouble shoot it.
But I finally found it. My truck has the Whipple supercharger & air inlet tube on it that comes with the SC kit, I finally found a very small hole/crack in the tube just under the silicone boot that connects it to the Throttle body.
Once I found it and plastic welded it back up, I then wrapped the end of the tube tightly with a stainless steel sleeve/band to reinforce the entire end, and it fits the boot tighter.
The codes have not returned, its been 2 weeks.
What a pain it was. The hole was letting unregistered air into the TB, downstream of the MAF, the funny thing was the truck never did show a lean condition on the wideband.
Anyway long story short if your getting the random P0171/0174 codes, take a very close look at anything that could be a vacuum leak, or un-metered air leaks on your intake tube, it does not take much of a leak to get the codes, I would say the hole/crack in my intake tube was no more than 1/16" wide by maybe 3/8"-1/2" long at the largest, and not all that area was cracked through & nearly all of it was under the connection boot.
JP02XLT
I had used propane, smoke machine, stethoscope & anything else I could think of to trouble shoot it.
But I finally found it. My truck has the Whipple supercharger & air inlet tube on it that comes with the SC kit, I finally found a very small hole/crack in the tube just under the silicone boot that connects it to the Throttle body.
Once I found it and plastic welded it back up, I then wrapped the end of the tube tightly with a stainless steel sleeve/band to reinforce the entire end, and it fits the boot tighter.
The codes have not returned, its been 2 weeks.
What a pain it was. The hole was letting unregistered air into the TB, downstream of the MAF, the funny thing was the truck never did show a lean condition on the wideband.
Anyway long story short if your getting the random P0171/0174 codes, take a very close look at anything that could be a vacuum leak, or un-metered air leaks on your intake tube, it does not take much of a leak to get the codes, I would say the hole/crack in my intake tube was no more than 1/16" wide by maybe 3/8"-1/2" long at the largest, and not all that area was cracked through & nearly all of it was under the connection boot.
JP02XLT
