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You will have to have the codes read again. There may be another problem. If it is the same code , small leak. Then the evap system needs to be checked. Evap consists of the cap, gas tank, the seal for the sending unit, Charcoal canister, hoses running from the tank to the engine, purge and vents solenoids and their seals.
P1443 is the Evaporative Emission Control System Control Valve. Any time you get this code always check your gas cap. If it is not installed all the way, or leaks, it can cause the evap emission code to come up. If the cap is okay...
The problem is probably caused by the Canister Purge Assembly. This assembly connects the intake manifold to the charcoal canister and the assembly is made up of hoses, a valve and a sensor. On the 1997 Ranger, it is located near the front of the engine compartment on the driver's side (the canister is right behind the driver's side headlight). Apparently, if there are any cracks in the hoses, or if the valve or the sensor wears out, this will cause the check engine light to come on, and return the P1443 code.
Part numbers for the canister purge solenoid/flow sensor assemblies:
P1443 - EVAP Control System / Vacuum System Purge Control Solenoid Or Purge Control Valve Fault. A fuel tank pressure change greater than minus (-) 7 inches of water in
30 seconds occurred with a purge (fuel vapor) flow at less than 0.02
pounds per minute.
Blocked fuel vapor hose between the EVAP canister purge valve and the FTP sensor.
Blocked fuel vapor hose between the EVAP canister purge valve and the engine intake manifold.
Blocked vacuum hose between the EVAP canister purge valve solenoid and the engine intake manifold.
Possible Solution: Check for blockages between the fuel tank, the EVAP canister purge
valve, and the engine intake manifold. Check for obstructions in the
EVAP canister purge valve diaphragm and ports.
The canister is on the passengers side near the firewall if I recall correctly.
It is usually carbon pieces from the evap carbon canister clogging the purge solenoid and purge flow sensor. There should still be a one piece purge solenoid and purge sensor with hose assembly available. You will also need to replace the carbon storage canister. After replacement disconnect the negative battery cable, hold your foot on the brake pedal for 30 seconds, then reconnect the battery.
the Canister Purge Assembly. This assembly connects the intake manifold to the charcoal canister and the assembly is made up of hoses, a valve and a sensor. it is located near the front of the engine compartment on the driver’s side (the canister is right behind the driver’s side headlight). Apparently, if there are any cracks in the hoses, or if the valve or the sensor wears out, this will cause the check engine light to come on, and return the P1443 code.
You need to check the purge and vent solenoids for proper operation. You need to check the pressure sensor for out of range ( defective ). You need to check the filler neck for cracks and make sure the clamps are tight. You need to check the vapor lines for loose fit. I've seen at the charcoal cannister where the lines connect it may not be on strait. A smok test will reveal this if its not sealing. You may have a leaking rollover valve or fuel pump seal on top of the tank. You may just have a vacuum leak under the hood, These trucks have an Evap management valve also that can be leaking or out of specs. Look on the emmisions lable or vacuum chart under the hood. This will show you the underhood components.