1996 Mustang 3.8 V6 EVAP Canister

For the 1996-1998 model year a frequent problem source is a failed purge flow senor (PF). Gas vapors are hard on rubber parts. The part is cheap enough and fails at such a high rate that it's cost effective to replace for pure diagnostic purposes.

It's very easy to perform a functional test of the purge solenoid. You should not be able to blow through it with no power applied. You should be able to blow through it with power applied.

If this were my car I would compare the vapor lines to a similar model year. The capped line doesn't sound right.

P1443 - Very Small Or No Purge Flow Condition

A fuel tank pressure change greater than a minus (-) 7 inches of H 2 O in 30 seconds has occurred with purge (fuel vapor) flow less than 0.02 pounds per minute.

• Blocked fuel vapor hose between EVAP canister purge valve and FTP sensor.
• Blocked fuel vapor hose between EVAP canister purge valve and engine intake manifold.
• Blocked vacuum hose between EVAP canister purge valve-solenoid and engine intake manifold.
• EVAP canister purge valve stuck closed (mechanically).

Check for blockages between the fuel tank, EVAP canister purge valve and engine intake manifold. Check obstructions in the EVAP canister purge valve diaphragm and ports.