opinions on vapor recovery system please

[GregWeld]

There's no good reason to have a vacuum leak in any motor. A PCV is a CONTROLLED vacuum leak.... and that would be "tuned" along with the car. Plug it with your thumb and your RPM's will rise... but the point is that it's in the mix when the car is being tuned.

Now you have an uncontrolled vacuum leak. What happens to the motor when you plug it up?? Depending on your system (ECU) you may have to go back and redo the VE table as the MAP sensor may (should) see a completely different signal.


The system you describe is overly complicated given our cars - and their "smog" requirements. Lots of people have gas smell in their garages... and nobody likes or wants that. That is the type of HOSE used in the fuel system. Todays gas has all these new formulations and the gas fumes escape the old style hose rubber. This smell can be eliminated by switching the flex lines to Teflon braided hose.... or a rubber style hose that states it's okay for the new fuels.

I'd call DSE and ask if they remember doing this particular job - and why it was installed and maybe you can get a better understanding of what you have.