I have been battling with a 440 (EVAP small leak) problem for months now
Checked both vsvs, both clicked when 12v is applied. So that looks ok.
charcol canister and gas tank neck, pipes are all seems very good, no rust any where, no cracks or abnormality anywhere. Changed gas cap with another camry, that car is still running without any error codes. This one got the CEL within 150 miles. Sometimes the code goes out and come back after 1k.
Recently I noticed the gas cap (original toyota) is getting loose and loose. Yesterday at the gas station, I was able to remove the gas cap without any effort at all. I always turn the cap atleast 1/2 rotation after hearing the clicks, yesterday i rotated 2-3 times to be sure (i am the only one filling the gas, so this is consistent).So didn't fill the gas, drove little bit and checked the gas cap, that sucker is really loose.
(when you open the gas cap, you normally hear the high pressure air escaping noise , however this car makes no noise at all)
Before I go buy a brand spanking new gas cap, is there any chance the neck is gone bad? I will probably get a new toyota gas cap this weekend, but just wanted to check your opinion on this.
I was suggested to take the car to a smoking test, got a quote for $180 for this test. I thought before spending, try the obvious ones and see if we can pinpoint this issue.
Appreciate your help