have you checked to make sure you dont have any vacuum leaks. do you have new hoses or originals. mine werent working when i first got mine, just had to trim about a half inch off the end all the lines as they were all dry rotted and split. also need to make sure you check the two lines going into the light switch under the dash. also could have a bad actuator. if you dont have a vacuum leak, a second canister is probably your best bet.
68 Ash gold RS 327