Contour Enthusiasts Group Archives Forums General Troubleshooting PO172

I removed the disc filter and cleaned the sock with carb cleaner from the inside out.
I was afraid to run it without the sock filter. Did anybody ever find someplace to buy new sock filters?

I completly cleaned everything out of the tank. The first time I drove it after the install it acted up again when the tank got low.
Is the pump basket suppose to hold fuel to work like a baffle?
Maybe this is the problem. I had read a thread about the returnless system problem, where the guy bought the Contour replacement pump instead of the FSVT pump and didn't have any more trouble.
The wires that plug into the pump were overheated at some point, I had to splice in the new pump wires to replace the old ones. Have you ever heard of this problem, or is that normal?

Fuel System:
�· Excessive fuel pressure
�· Leaking/contaminated fuel injectors
�· Vapor recovery system concern



I checked for fuel pressure at the test port after the car had not run all day and no pressure was present. That is why I think I have a leaking injector. How can I test my injectors?

I sperated the fuel line at the fuel rail and pressure tested the main line to the tank, pump, etc. the pressure dropped from 42 psi to 30 psi in an hour and a half. Meanwhile I had another gauge on the fuel rail testing the injectors. They held 42 psi for the whole time. So I think the injectors are fine. Any other suggestions would be greatly appreciated.

I took my car to the stealership for diagnostics. They told me the MAF voltage was off and was the wrong part number for my car and could not go any further without replacing it for $400+ so I went and got it stopped by Autozone on the way home and bought a remanufactured MAF. Needless to say my fuel trim on bank 1 is still 7-9% lower than bank 2.
My upper O2 sensors are switching well (even the stealearship said so). The injectors are holding pressure well. What else could cause the bank one fuel trims to be so much lower. When I switched the two upper O2 sensors they were chalked as if the engine is really running lean.
What's really odd is my brother has a 24v 2000 Taurus with the same code P0172.