Dirtman
Former Middleweight Moss Fighting Champion
- Joined
- May 28, 2018
- Messages
- 19,304
- Reaction score
- 13,326
- Points
- 113
- Location
- 41N 75W
- Vehicle Year
- 2009
- Engine Type
- 2.3 (4 Cylinder)
- Transmission
- Automatic
- 2WD / 4WD
- 2WD
- Total Lift
- It's up there.
- Total Drop
- It's down there.
- Tire Size
- Round.
- My credo
- I poop in the furnace.
I could make a long rambling and somewhat comedic story but Ill sum it up...
Im working on this hack job ranger my brother in law just bought. (Beautiful rust free southern truck just typical backyard mechanic repair jobs) 06 2.3 manual.
The cat was gone and just replaced with cheap flex pipe so first thing we did was go buy a complete new exhaust cat and to tailpipe. The upstream o2 was still connected but the downstream was unplugged and removed. I said screw the downstream for now and plugged the upstream back in.
My reasoning was that to my knowledge downstream o2 sensors don't effect the way the engine works, they simply monitor the catalytic converter. (I know some vehicles will stick the computer in open loop if the downstream o2 malfunctions, but they do not effect the fuel trims)
Anywhoozle the engine was still running crappy but lots of other factors going on however I said screw it and went and got a rear o2 since my brother in law wants the truck back to factory specs anyway. Hooked up the downstream and the truck came to life... ran like a champ.
The truck was going into closed loop mode prior to installing the downstream o2. So shat gives? Am i just wrong and downstream o2 sensors actually do effect the fuel trims?
Im working on this hack job ranger my brother in law just bought. (Beautiful rust free southern truck just typical backyard mechanic repair jobs) 06 2.3 manual.
The cat was gone and just replaced with cheap flex pipe so first thing we did was go buy a complete new exhaust cat and to tailpipe. The upstream o2 was still connected but the downstream was unplugged and removed. I said screw the downstream for now and plugged the upstream back in.
My reasoning was that to my knowledge downstream o2 sensors don't effect the way the engine works, they simply monitor the catalytic converter. (I know some vehicles will stick the computer in open loop if the downstream o2 malfunctions, but they do not effect the fuel trims)
Anywhoozle the engine was still running crappy but lots of other factors going on however I said screw it and went and got a rear o2 since my brother in law wants the truck back to factory specs anyway. Hooked up the downstream and the truck came to life... ran like a champ.
The truck was going into closed loop mode prior to installing the downstream o2. So shat gives? Am i just wrong and downstream o2 sensors actually do effect the fuel trims?