fuel smell, even when truck is warmed up

[Vader's Fury]

I have been getting a raw fuel smell from my Excursion lately. I noticed it this summer, but it is much worse now than it was then.

This is after hours of driving, not just when it is cold.

Truck is 100% stock with 205k miles.

Starts great even when it was down to <5 here recently. Cranks over one or 2 revolutions and fires right up.

I watched inj pressure and didn't see anything abnormal, but i was just glancing at my scan gauge. Haven't had time to hook up my A/E yet and log it.

Any thoughts?

 

[6.0 Tech]

Fuel lin o rings or drian valve. Or are you smelling it out of the exhaust?

 

[Jomax]

Or the fuel line going to the pass side rear head. The clamp on the block could've worn the line.


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[6.0 Tech]

Yeah forgot about that one... that usually pisses bad enough to where it is noticed pretty easily though.

 

[Vader's Fury]

Sorry I should have specified it is an exhaust smell. Truck is not leaking anything.

 

[6.0 Tech]

Ok, injector o rings? Any smoke?

 

[ghohouston]

Maybe give the downpipe clamp a tighten, sometimes they can let some exhaust out in the engine bay, if the up pipes and manifolds aren't leaking.

 

[Justin@DP-Tuner]

If it is an exhaust smell, I would normally say injectors if you are bone stock. However, if it is starting up that easy in cold temps, I think it may be something else. I am assuming you are smelling it all the time, both when the truck is cold and warm?

Do you get your fuel from the same place every time? Could be a fuel quality thing.

 

[Vader's Fury]

While I usually get my fuel from the same place, I have bought enough tanks from other stations to rule out a fuel issue.

I to thought it was a injector issue but the darn truck starts better in cold weather than any other truck I have had. Was 4 degrees this am with ice over the entire truck and it fired right up. Hasn't been started since sat morning when I moved it in the driveway. Only ran for about 3 mins that time. So over 48 hrs sitting in below 40 temps and not plugged in and it started on the 2nd or 3rd revolution.

I was also thinking compression but again it starts so well.

It makes me think I have a sensor that is throwing my fueling off. Just not sure what might do that. I really need to get my A/E hooked up to it I guess.

 

[Vader's Fury]

Ok, injector o rings? Any smoke?

It smokes when I start it up. Possibly a little more than it should but it goes away as it warms up. Just the fuel smell is stronger than it should be