Why do I get a STRONG gas smell through the vents 1st thing in the am in the col on 1995 Nissan Maxima

On a coId start when I turn on the vents, I get a strong gas smell through the vents. It lasts about 20 min. I have changed the fuel pump and checked the fuel lines. What else could it be? The car has 210k miles. There are no codes that come up

Asked by for the 1995 Nissan Maxima
2 answers 1 comment
small leaks can be hard to find but #1 is correct.if you can't find it have it ck'd b4 your car poss catches fire.
Check the injectors and the injector rail for seepage.
I was told it could be the canister but wouldnt a code come up for that? Should the car be running when I check the injector rail? How do you check the injectors only?