Fuel leak, but where?

[daren_p]

So in the last week or so I have been smelling gas fumes while driving when doing wot/high boost pulls. The problem is I can seem to find any leaks, I've checked all the lines etc with the car running & nothing. I also tried turning the pump on without the car running (dsmlink) & nothing so I increased the fp to 70 psi (slightly higher then I would see when boosting), & still nothing. The only thing I can think of is the injectors. If I have just the pump running where do the injectors stop the flow of fuel? (ie do they stop it right at the inlet) so it might be possible to have a leak at the lower seal, injector body, etc only when the car is at high boost, & is dried by the time I check them at idle & wouldn't show up with just the fp running.

 

[steve]

The pintle on the injector is where the fuel stops. Any leaks from the lower insulators would also be vacuum/boost leaks when running.

Do you have all the emissions stuff hooked up? If you don't you might be smelling fumes from the purge.

If you have anything but the smallest of fuel leaks you would notice the decrease in gas mileage.

Steve

 

[daren_p]

Still have all the emissions hooked up. As for the gas milage, can't really tell since it changes quite abit on the type of driving I'm doing and how often I max out the 20 psi boost gauge . So would a leak in the lower insulator show up during a boost leak test?

 

[steve]

So would a leak in the lower insulator show up during a boost leak test?

Yep.

 

[daren_p]

Thanks Steve will do a boost leak test to check for that. So if the lower seals check out ok is there any other possible cause that I'm over looking?