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Chuck, ASE Certified Technician
Category: Ford
Satisfied Customers: 2100
Experience:  33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
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1997 ford mustang gt: obd2..low or no flow to perg canister

Customer Question

1997 ford mustang gt showing p1443 code obd2 and sez low or no flow to perg canister ,replaced perg valve, made sure lines were all clear . how do i fix this problem need to pass smog
Submitted: 6 years ago.
Category: Ford
Expert:  Chuck replied 6 years ago.

This is a problem with the canister purge valve. Here is a picture of the system





The purge valve should have power on the red wire then when the PCM grounds the GY/Y wire this activates the solenoid so vacuum can then be applied to the vapor canister.You will alos need to check and make sure you are getting vacuum to the canister purge valve.


You can take and hook a hand vacuum pump to the solenoid the go to the canister and hook a vacuum gage to the line there. Then turn key on and make sure you have power to the canister purge solenoid on the red wire(if not this is your problem and you will have to trace this wire) ,if so then ground the GY/Y wire and pump vacuum to the solenoid and you should read vacuum at the canister hose.


If this is ok then you problem is most likely in the GY/Y wire between the solenoid and the PCM. You can then go to the PCM and on pin 67 and ground the wire and repeat this test. If it works then your problem is the PCM itself,however this would be rare.



Here is a pic of the connector at the PCM





Edited by Chuck on 8/26/2010 at 10:58 AM EST