HPFP

[JMH1980]

We were noticing a fuel smell at start up intermittently. I found TSB's for the fuel feed line leaking above the tank, so I replaced that to the updated part. However, when I pulled it, it wasn't leaking. There were signs of it rubbing in the areas of concern, so I wasn't mad about it .

I ended up borrowing a bi-directional scanner from a friend to watch the live data on fuel trims. The long term trims specifically were under compensating. Seems it was inline with the HPFP being the culprit. So I pulled my oil dipstick and it smelled like fuel...
Took about 3.5 hours to do yesterday.

 

[ReaperHWK]

You ruled out the evap system and the charcoal canister? That is a common symptom of that leaking as well. The fuel smell.

 

[JMH1980]

You ruled out the evap system and the charcoal canister? That is a common symptom of that leaking as well. The fuel smell.

Can you elaborate on those... I actually did not. Wow. (Fill the parts cannon)

 

[Bigkevschopshop]

On the charcoal canister, it normally gets some fuel slosh from people topping off, and gunks up the carbon in the canister, there are some videos about people online cleaning charcoal canisters and having good results doing such things. Most of the time the evap and canister issues show the most in fueling up.

When adding fuel to the filler, the pump cutoff kicks in alot making you think you have a full tank of fuel but you dont, its the evap canister not allowing vent fumes to go through making these new style gas pumps click off. If you dont have that issue at all then I would think you dont have an Evap or canister issue.

 

[JMH1980]

On the charcoal canister, it normally gets some fuel slosh from people topping off, and gunks up the carbon in the canister, there are some videos about people online cleaning charcoal canisters and having good results doing such things. Most of the time the evap and canister issues show the most in fueling up.

When adding fuel to the filler, the pump cutoff kicks in alot making you think you have a full tank of fuel but you dont, its the evap canister not allowing vent fumes to go through making these new style gas pumps click off. If you dont have that issue at all then I would think you dont have an Evap or canister issue.

I have no issues fueling up at all.

 

[swathdiver]

I have no issues fueling up at all.

Did the repair fix the smell?

 

[Fless]

If the purge valve on the engine is intermittently staying open with the ignition off, you could get fuel vapors incorrectly entering the intake, which might smell outside the engine. But that would likely cause long crank times due to flooding, and you haven't mentioned that. Just a thought.