I have a string fuel smell in the compartment of my car when driving. Ha it when I bought it last August and thought it was only running rich. Got a tuner from AM and after uploading the street 93 tune the smell went away and the engine ran better. Changed the oil the other day and now the smell is back. Tune is the same. Only other variable is the outside temps are starting to warm up. 40s vice 20s. Any ideas?