I've got a 1997 Honda Accord LX, with an F22B2 engine. Car runs great, but about two weeks ago the CEL came on. I pulled the code and it is P1457 (EVAP Emissions Control System Leak Detected). I already checked the gas cap, and the gasket looks fine and it was and is tight (I am allowing it to click multiple times when closing it).
I have an Accord HELM manual, but it is for a 1994, and the section on testing the EVAP control system is lacking some of the gadgets I am seeing. I started following the troubleshooting section on Page 11-123. No vacuum from the EVAP purge solenoid when cold and throttle is snapped to 3K, and there is vacuum when the engine is warm and the throttle is snapped to 3K (this is what you want, according to the HELM).
Now for where things get different. The manual shows the EVAP canister as having two hoses going in the top (one from the tank, one going to the EVAP solenoid), and the fresh "purge air" hose going into the bottom. My canister has the two hoses going into the bottom of the canister (one from the two way valve, one going to the EVAP solenoid), and what I have to assume is the fresh "purge air" hose going into the top. Also, the Canister Vent Shut Valve on top of the canister is not in my HELM, my two-way valve has some kind of solenoid on it (HELM doesn't show this), and the HELM also doesn't show the Vent Pressure Sensor.
Can someone help me out and hook me up with the EVAP control system section of a HELM for a 1997 Accord LX? If not, I can take some pictures and maybe someone can help point out what solenoids are what and how to troubleshoot them.
Personally I think it's something with my two-way valve. When I hooked my vacuum pump up to it to test it, it made some kind of moaning sound that I have heard before after I shut the car off. I couldn't properly test the two-way valve per the HELM I have, as my vacuum gauge doesn't read as fine as it requires.
Thanks in advance.
ETA - see picture below of what I have: