Slice

3 states from home. Pulled up to light. Smell raw fuel thru Ac system. Checked underhood no leak visible. Smells really strong by fuel tank. Any other ideas besides loose connection. Lift pump replaced 5 k ago to intake.

BigIron70

Most likely on the low pressure side of fuel system. If it was high pressure you would see a spray mist under hood. Check the supply line at back of fuel filter housing use 17mm wrench to tighten fitting. With the engine not running.

Kowalski

Also check the fitting on the back of the head for the return line. It is a pita to see unless you have a little sneaky camera gadget or mirror. Just take a shop towel and reach in and check for moisture, with the truck off just incase there is a leak on the high pressure side at the back. Is there any signs of dripping fuel or wet spots visible from the underside?

Slice

well found loose return line, but after few hundred miles later cracked injector line going to the back of the motor... right in the bend of the line... down for the evening, so hopefully the dealer will have the part ang get back on the road.. broke down in Searcy, Arkansas.... 10 hrs from home...