Okay i've read just about every thread on pulsation dampeners ever created.
i am removing my intake this weekend to clean a stuck 5th port sleeve. While i am down there i'll check the pulsation dampener but every thread i read was about S4's dampeners failing. Anyone heard of an S5 failing. What i am wondering with my car having over 100,000 miles on it should i go and put a 200 dollar primary fuel rail on it while i have it apart??? I am Not considering the banjo bolt mod. Just want to know any experiences with S5 dampeners failing??
Thanks,
micah

 

you sure read every thread? banjo bolt mod cannot be done with a s5 rail because the s5s have the pulsation dampeners welded onto the fuel rail. It is possible for them to fail, but it's much rarer, and I believe they don't leak fuel all over the place like the s4 ones do.

 

S5 PD's leak just the same as S4 ones (in fact I have seen more S5 and S6 ones fail than S4 ones- but I know I am the rare one).

They also leak worse when they do go, as the rubber plug on the end usually falls off.

If it has more than 100K miles on it, just replace it.

 

thanks icemark...i definately will replace it!!!!! Do you know anyone other than mazdatrix that sells the primary fuel rail, theirs is like over 200 bucks????

 

Mazdaformance.com used too for around $160 on the S5 rail/PD, but I heard rumor that they stopped the internet end of the company.

 

Yeah I'm gambling on this, so far no leaks:
89 Vert - 141K miles
89 Vert - 122K miles
91 TII - 162K miles

 

Yeah you are... I have seen FD (S6) ones fail as early as 60K miles and they use that same style rubber stopper as the S5 ones.

But the FD engine compartment does run considerably hotter than the FC