What exactly does it do? I apologize if this is a dumb question.
Thanks

 

My understanding is that is absorbs pulsations in the fuel pressure to keep the pressure at the injectors themselves more consistent.

 

it absords pulsations created by the injectors in order to make the fuel pump last longer.

which makes me wonder why someone hasn't come up with a replacement by-pass type of a part. My reason for this is that the cost of a FPD is upwards of $120 (IIRC)
Since they are a known source of fire problems in these cars, wouldn't you rather replace your fuel pump every 5 (or whatever) years and reduce the possibility of a fire?
or replace your FPD and fuel pump every seven (once again, just a number) years???

 

I know of people removing the FPD and then tapping the hole for the plumbing of AN fuel lines.

 

I know that some people do it. I want to know why more don't!!

 

I thought its sole purpose was to "dampen" the pressure waves, or differential between the pump and when the injectors open/close, like DamonB said. By doing do, it would seem to have a limiting effect on cavitation inside the fuel rail itself, providing smooth steady flow fuel to the injector. Since there is not a lot of volume of fuel in the rail, reversion and pressure changes might cause incorrect fuel delivery. I can't see how it would let the fuel pump last longer.

When you are dealing with a larger volume of fuel (-6 Supply) I imagine the volume of fuel is enough to do without the dampener, not to mention the dampener would restrict flow into the rail with that fuel source. That is why people remove it. I can't see the benefit of removing it without an increased fuel supply/return

 

Umm.....to elimitate a potential fire hazard


Supposedly, the fuel pulsations created BY the injectors are tough on the fuel pumps. (or is at least the general concensous of the information that I've read about it)

to my knowledge, there aren't a ton of other cars that use them, There are a few. I guess the short of the long is why did mazda use them on our cars? our injection system isn't really anything special. and if you can eliminate it and never have to replace it again, why not?

 

So it's ok to remove the dampener??
I am running a single turbo and plan on replacing the fuel lines with ss and AN fittings. Are you saying I can just take the dampener out of the equation?