- Joined
- Sep 7, 2021
- Messages
- 132
- Reaction score
- 55
- Points
- 28
- Location
- Boise ID/Camarillo CA
- Vehicle Year
- 1986
- Make / Model
- Ford Ranger
- Engine Type
- 2.9 V6
- Transmission
- Manual
- 2WD / 4WD
- 4WD
- Total Lift
- 3"
- Tire Size
- 31x10.50R15
Upfront info
-86, 2.9l 4wd, 5speed, bone stock engine, Cat is not original and I know almost nothing about it (bought the truck about 2 months ago)
-Runs and idles like a top, passes KOEO and KOER with no codes
-Air filter, cap, rotor, and wires all look new, plugs ceramics look new but I did not pull them (yet)
-Verified all vacuum lines hold vacuum, replaced all the ones with cracks with new lines
-Timing with spout removed right at 10 degrees
-I tested EGR by applying vacuum to the EGR valve nipple and the truck stalls out. Valve DOES hold a vacuum
Symptoms
-Failed HC and NOx
Questions:
-When I got home, I put a vacuum gauge on the EGR signal line and it was twitching a little as I drove it around but not enough to open the EGR Valve. I would assume It would need at least 5" of mercury to open, right? I thought KOER tested EGR/it's solenoid. No?
-I have a new O2 sensor and am going to throw it on hoping that addresses the HCs. At what point do I assume my Cat is bad and go get a new one?
-86, 2.9l 4wd, 5speed, bone stock engine, Cat is not original and I know almost nothing about it (bought the truck about 2 months ago)
-Runs and idles like a top, passes KOEO and KOER with no codes
-Air filter, cap, rotor, and wires all look new, plugs ceramics look new but I did not pull them (yet)
-Verified all vacuum lines hold vacuum, replaced all the ones with cracks with new lines
-Timing with spout removed right at 10 degrees
-I tested EGR by applying vacuum to the EGR valve nipple and the truck stalls out. Valve DOES hold a vacuum
Symptoms
-Failed HC and NOx
Questions:
-When I got home, I put a vacuum gauge on the EGR signal line and it was twitching a little as I drove it around but not enough to open the EGR Valve. I would assume It would need at least 5" of mercury to open, right? I thought KOER tested EGR/it's solenoid. No?
-I have a new O2 sensor and am going to throw it on hoping that addresses the HCs. At what point do I assume my Cat is bad and go get a new one?