Well apparently Mazda thinks the PD is still a good idea. My friend just got a brand new Protege 5 and it has one as well. Lucky for him it sits right on top of the engine so its an easy change. Do all Mazdas have one?

 

My MP3 has one, but that is basically a P5.

 

I think all the MX-3 and MX-6 had pulsation dampners too.

Fikshun

 

Do all those cars have problems with them too?

 

If you notice they changed the design of the dampner.

I doubt its prone to fall apart and leak.

 

Most Japanese cars and many german cars have them... why does everyone think its just a Mazda thing.

Honda has had the same leaking problem for years that the FC has had... the only difference is that the fuel doesn't leak onto the exhaust

 

I dunno, I've never heard of any other car with one. But it doesn't make sense if only some cars have them. I mean if its not needed, it makes sense to limit the number of things that can leak fuel.

 

There's no such thing as a "dampner". It's "damper", take out that "n" and you got it.

 

Is there anyone who makes good replacements that don't leak?

 

Is there anyone who makes replacements that don't leak?

 

yes, its called a banjo bolt.

 

I think he meant a replacement, not a band aid

 

Almost ALL FUEL INJECTION SYSTEMS have some sort of Pulsation Damper - Its Damps out the pressure waves caused by the injectors opening & closing rapidly. At certain frequencies the harmonics of the pulses can actually stop the fuel flow to the injectors, thats why replacing the FPD with a banjo bolt is a STUPID Idea!

 

BTW, it's "dampener".

Dale

 

Its actually "damper." At least thats what Mazdatrix and everywhere else calls it.

 

I'll be damned - just checked the shop manual, and it is "damper". Kind of a dumb name, since it dampens, it should be a dampener - it doesn't "damp".

I stand corrected!

Dale

 

Ya I know. I always thought it was dampener since it does "dampen" but its not. Maybe a mistranslation?

 

Yeah, most likely some bad Engrish (check out http://www.engrish.com - good stuff).

Anyhow, I did some digging. The pulsation damper typically helps under idle and very low-load situations - that's where the pulsations can be a problem. It can cause a small miss or stumble. There's also speculations that you can get resonance in the fuel system that transfers to the body of the car. Anyhow, eliminating the PD doesn't seem to be a problem at full throttle/heavy load at all. Supra guys have been ditching their PD's for years.

Anyhow, mine's removed, and that's yet another experiment that's thrown in on my sickly out of control project .

Dale

 

Cool, finally someone in Ventura! Dude, I've been running the banjo bolt for the better part of a year. I don't think I am stupid and I haven't had any trouble. It sure as hell beats having an engine fire. If I hear of anyone with a banjo-bolt related problem, then I'll switch to an overpriced rubber diaphragm.

PJ

 

Ugh, Nearly all FI cars come with a PD. THis is to dapmen the pulsations in the fuel like to direct the shock into the damper rather than on other components.

Mine failed a while back ... and I just JB weled it up.

You can read about it here : https://www.rx7club.com/forum/showth...threadid=95229

And here : https://www.rx7club.com/forum/showth...ghlight=RUMORS

As I stated, RETed as well as many others say the Stock fuel pressure is not enough to cuase damage as the rubber hoses in the system can absorb all the shock w/o any ill effects. OF COURSE... this is in RX-7s.

THe protege5 is another story... one i nkow nearly nothing abuot. Im sure it'll be alright. This has been a serious complaint to Mazda over the years and they would not just let all those complaints go w/o making sure not to **** up in the future.... hope this helps (or at least gives you guys a false sense of security )