Mataroa
New Member
- Joined
- Dec 8, 2017
- Messages
- 9
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 2004
- Make / Model
- Ford
- Engine Size
- 4.0L
- Transmission
- Automatic
Hello there!
I bought a (well) used '99 Ranger in Sept. of 2016, and have been replacing parts as I've gone along. Unfortunately, something new has gone awry and it has me stumped.
The truck's been running a bit rough lately. A la, chugging at stops, including rocking of the engine and the whole truck. Got a check engine light on top of that, as though I needed something else to know something was wrong.
The DTC is for a 'lean fuel-to-air mixture' (P0171), and was told it was a fouled MAF sensor. However, I came across something else in the engine compartment that might or might not be related to the issue I'm having. In any case, it's worth knowing what it is and how to fix it.
On the driver side of the engine bay, near the battery and underneath the brake fluid reservoir, is the item in question. To be specific, I can feel air moving out of a hose that comes from the mystery device and runs back towards the engine itself (I haven't pursued the hose the other way, since the issue is out here in the open).
What exactly is this, and what does it do? Even if it doesn't pertain to my DTC, I'd like to fix it. It's going to bug me until I do so.
Images:
Red circle: The leak itself. Can feel air moving through the hose when the engine is running.
Blue circle: The mystery component. I wonder if that electrical connection covered in gunk might have something to do with my problem.
Thanks for reading, any help would be appreciated. As much as I love my truck, I'm sure I'll be visiting this forum quite a bit as stuff breaks.
Edited to add picture, because I only use my head sometimes.
I bought a (well) used '99 Ranger in Sept. of 2016, and have been replacing parts as I've gone along. Unfortunately, something new has gone awry and it has me stumped.
The truck's been running a bit rough lately. A la, chugging at stops, including rocking of the engine and the whole truck. Got a check engine light on top of that, as though I needed something else to know something was wrong.
The DTC is for a 'lean fuel-to-air mixture' (P0171), and was told it was a fouled MAF sensor. However, I came across something else in the engine compartment that might or might not be related to the issue I'm having. In any case, it's worth knowing what it is and how to fix it.
On the driver side of the engine bay, near the battery and underneath the brake fluid reservoir, is the item in question. To be specific, I can feel air moving out of a hose that comes from the mystery device and runs back towards the engine itself (I haven't pursued the hose the other way, since the issue is out here in the open).
What exactly is this, and what does it do? Even if it doesn't pertain to my DTC, I'd like to fix it. It's going to bug me until I do so.
Images:
Red circle: The leak itself. Can feel air moving through the hose when the engine is running.
Blue circle: The mystery component. I wonder if that electrical connection covered in gunk might have something to do with my problem.
Thanks for reading, any help would be appreciated. As much as I love my truck, I'm sure I'll be visiting this forum quite a bit as stuff breaks.
Edited to add picture, because I only use my head sometimes.
Last edited: