Code 173 Rich - Replaced Fuel Pressure Regulator, check engine light gone

[///Manuel]

Hi all, the check engine light came on the other day, checked the code: 173 rich bank 1.
Looked it up on the forum, went to Autozone grabbed an FPR for $77, installed it and no more light.

Write-up:
- Ran the car, pull the fuel relay fuse
- Tried starting the car a few times to drain some more gas
- Unscrewed the fuel line going on top of the FPR (17mm)
- Unscrewed the two bolts holding the FPR to the fuel intake (8mm)
- Pulled out the FPR (got lots of pressurized air and gas, careful!)
- Lubed o-ring of new one with some oil
- Pushed the new one in, installed the two screws, plus fuel line
- Fired it up and no more check engine light!

 

[huntman58]

sounds good

 

[92exp4x4]

This works on your 92, it only has one O2 sensor and therefore one "bank"( all 6) of the cylinders are monitored. California emission trucks have 2 sensors and the computer looks at two banks a right and left. The regulator affects all cylinders and may not be the answer on these trucks.

Good job finding your problem. I struggled with a 302 mustang that had a 172 code, right bank lean. These can be difficult to diagnose. The problem wound up being in the valves.

 

[Yavapai Bill]

Yavapai Bill

Hi all, the check engine light came on the other day, checked the code: 173 rich bank 1.
Looked it up on the forum, went to Autozone grabbed an FPR for $77, installed it and no more light.

Write-up:
- Ran the car, pull the fuel relay fuse
- Tried starting the car a few times to drain some more gas
- Unscrewed the fuel line going on top of the FPR (17mm)
- Unscrewed the two bolts holding the FPR to the fuel intake (8mm)
- Pulled out the FPR (got lots of pressurized air and gas, careful!)
- Lubed o-ring of new one with some oil
- Pushed the new one in, installed the two screws, plus fuel line
- Fired it up and no more check engine light!

Same code - same result except FPR now $102.

 

[Roadrunner777]

If anyone is thinking they might need a regulator at some point... Amazon has the Motorcraft unit (new, not rebuilt) for $50.77 and ships free. They only have 4 left at that price. It also appears to be compatible with the SOHC V6.