Hey guys, I've been having issues with my EVAP system for a while. The issues started with a slow filling fuel tank, and after attempting to fix that a while back... I ended up with a slow filling fuel tank, multiple leaks in the system, along with the occasional "tighten gas cap" message. Long story short, rather than continue down the wormhole to find my original problem, and my new EVAP problems, I had BlackBear performance delete the EVAP system from the computer when I had them do my engine tune.
So I have had no engine lights or issues since having them do that, but my tank still fills slow and I still get the occasional "tighten filler cap". So before it gets painfully cold and I have to stand at the pump to fill up, I thought Id try to see if I can remove or modify the system to vent properly and not throw the loose cap message.
One solution as I understand it is to simply remove the charcoal canister and my fuel tank would fill normally, but would the computer see a low pressure and throw the "tighten fuel cap" message? Could I remove more than just the canister with desirable effects?
After learning more about how the system works, im guessing my original issue was probably the purge valve... If I was to replace the purge valve could I take the line from the tank to the charcoal canister and the line from the canister to the purge valve, and connect them together to bypass the canister and send the gas vapers straight to the stock vent?
I guess when Blackbear "deleted" the EVAP system, they just programmed the computer to never open the EVAP solenoid, so the engine never draws the fumes from the charcoal canister and therefore the OBDII system never sees these pressure issues to throw the engine codes. But the physical pressure blockage still impedes filling up the tank all while the I'm guessing the BCM senses my small leaks in the system and thinks the cap is loose.
I've tried to learn about how the system works and I think I have a general idea, but I wanted to see if anyone else had any insights or experience on how to get the fuel tank to vent effectively and safely? I realize this is not the proper way to fix this issue, but also if I could just get around the slow filling and gas cap dash message then it would be one less system to worry about upkeeping and it would be truly deleted. Making the truck just a little simpler to work on the future.
Because I really miss that.
