I've used this in hot (100+) weather for a few weeks, and now a few cold-ish mornings in North Texas (Fort Worth) with absolutely no issues. I'm also running a Bosch HV fuel pump with E85 and 80# injectors, so I'm definitely pulling a fair amount of fuel out of the tank.

I removed all of the junk from under the hood, put a cap on the vent hard line coming up the firewall into the engine compartment, and drilled that little 3/32 or 1/16" hole in the inside of the cap. I'm very pleased with the results of the mod... it cleaned up my engine bay a bit more, and seems to work great.

 

I love the pic of the gas cap that reads "without vent" in German, which has been vented, lol.

 

Could you post a pic of your engine compartment now i am interested in seeing the difference . I may remove this stuff as well my system has a leak and sometimes it smells fuel .

 

Here you go. Don't forget, you'll also need to plug the throttle body connection too.

 

That area looks much better . I will think about doing the delete as well now that the car does not have a engine. Thank you for posting.

 

Another pic to see where the hose used to run among the AC lines by the cam tower...