How to fix strong gas smell

[Bobber10]

There is a strong gas smelling coming from my engine and I need to know if this is normal? I’ve checked all the fuel lines many times and haven’t found a leak. It’s very present went heat is on.
Any advice would help
Thank you.

[AZhitman]

Absolutely not normal.

Test fuel pressure at the rail - I suspect there's a leak, you just haven't found it yet.

Make sure you're checking injector o-rings (likely toast by now), vacuum lines and emissions lines as well - doesn't need to be liquid fuel to smell awful (and cause a hazard).

[Bobber10]

I looked and the leak was a fuel line on the 4th cylinder injector and it was the line going to it.