Where is the leak at? Engine?
Most likely a fuel leak under the hood.
fuel leak on top of what type of engine, gas or diesel?
usually there is a fuel leak internally however it can also be an air leak
If your dodge diesel runs rough at 2100 RPM it is probably starved for fuel. Have the fuels filters changed and / look for an air leak in the fuel system. My 1996 had rusted fuel lines on the top of the fuel tank. cost about $600. Canadian to repair.
You've got a leak in your fuel injection system.
You can try to repair a small leak in a diesel fuel tank without taking off and welding by using specially made putty.
I've been trying to find that leak myself. I found that 2 fuel lines with loose hose clamps at the filter cannister, and also found a loose fuel filer. It is still leaking from bottom of cannister, I'll be removing it this weekend and fixing or replacing the fuel filter cannister.
The diesel leak off is for getting air out of the system should you run out of fuel. It is very difficult to get the diesel engine restarted after running out of fuel as compared to a gasoline engine which is relatively easy. Once you have run your diesel out of fuel, the injectors must be primed for you to have even a chance of getting restarted. So, VW/ Mercedes owners, keep that tank about a quarter.
I suppose if you had a leaky injector it could.
what would it cost to fix a leak in a 7.3l fuel heater
the return fuel line is more than likely leaking
Your fuel system might have a leak if the strong smell is similar to the smell of refuelling. Or the exhaust might have a leak allowing fumes to get in the cab with you. Diesel fuel has a strong oder if burnt in a rich mixture an in under hard acceleration.