I drive a 2001 CRV LX for a rural mail route with 50 miles and 760 starts and stops each day as well as additional idle time at each mailbox, totaling 6 - 7 hours of run time per day. I've always been extremely careful to do all maintenance, both scheduled and preventative. Car now has 93K actual miles, not including all the extra idling time and it has no symptoms of malfunctioning other than recently starting to burn oil (no leaks).
However, for the past 6 months I've been noticing extreme raw gasoline fumes to the point of dizziness and nauseau once the car warms up after being on the route for 30 minutes or so. But the kicker is this.... it only happens when the outside air temp rises to about 75 or above. The hotter the air temperature the more extreme the fumes become. If it's cool outside there are no fumes whatsoever. As long as it's warm outside, fumes are there regardless if window is up or down, AC on or off.
I took it to a muffler shop and a thorough examine turned up no exhaust leaks. No check engine codes either. Texas summer is already here. Temps of 93 degrees on Thursday made me realize I have to figure this one out or I'll develop cancer before Summer time is over. I've searched the forums and think maybe something is wrong with the Evaporative Emissions but where to start? Any clues would be greatly appreciated. Thanks.

 

take it to a professional immediately.

 

have u checked for fuel leaks? since your driving a stock car i assume you havnt modified anything with your fuel system like fuel rail or injectors or filter? your best bet is to take it to a dealership or shop for a check, it seem like u have a fuel leak or are running rich

 

Just a note, as humans our sense of smell increases as the temperature of the air were breathing goes up. Ever try smelling something when its 20 degrees or colder out? Your fuel problem is more than likely not temperature related.