Fuel Dampener question
 

I just bought a 87 FC and the owner said the Fuel Dampener was just replaced.

WHAT THE HECK IS A FUEL DAMPENER ?????????

thanks,

Rex:cool:

He probably meant Pulsation Damper

That's a good thing. Your suppose to replace the Pulsation Dampener every 125K miles, otherwise there's a potential gas leak.

BTW - always keep one of those "mini" fire extinguishers in your car. You'll probably never use it, but it's cheap insurance :)

OK, so what is a Pulsation dampener? Where is it located in the Fuel System?

Your Pulsation Damper "sits on top of the engine". It Is located at thr front of thr Primary Fuel rail. It smooths out the fuel prior to combustion. The PD Is notorious for the lead cause to engine fires esp. s4's to catching fire due to the screw retaining It backing off. I was lucky to have caught this prior to a fire breaking out. S5 owners are also prone to this but not as bad due the Integration of the PD to the Primary Fuel Rail that Mazda somewhat corrected In this series.

I never replaced mine. I simply put the screw back In and than put a dab of silicone at the end of the screw head. Although people may beg to differ, It worked out good for me for the last 2 years.

For those who want to eliminate this fire hazard, replace the dampner with a banjo bolt. Someone made a post with pictures of a fine example, cant remember who, but heres the pictures.[IMG]C:\carz\0000000000earlsbanjobolt2.jpg[/IMG]
[IMG]C:\carz\0000000000earlsbanjobolt1.jpg[/IMG]
[IMG]C:\carz\0000000000earlsbanjobolt4.jpg[/IMG]

No pics displayed. Just funny little red x's.

Here is the post i did on the subject W/Pics

https://www.rx7club.com/forum/showth...hreadid=114684

so all i need is the middle piece and not the two hose ends...i say this cause in the pics, the hose ends are still on the ground...and only the bolt is in the fuel rail thing....so i assume you only need to bolt part correct??

ya all you need is the bolt. But it's a size specific banjo bolt. I'm not sure where you will find just that bolt for sale. I went by the 2 part #'s on Ted's page... the first (cheaper) part that had that bolt was sold out when I tryed to get it from summit. So I had to get the second (more expensive part) that had the right size bolt... I was in the process of putting everything back together so I was not about to wait on a back ordered part so i payed a little extra for that whole assembely.

i got a hold of the Earls people in the uk (email) and they said they would be happy to ship the part to me....so thats what im gonna do i guess....it will only be like $13 shipped...so i was pretty happy about that!

hey can anyone give me the exact specs on this bolt cause i need to order one but i don't know what size.

-Andrew

You want to avoid the Banjo bolt band aid, as it will affect fuel delivery and fuel line life.

A PD is found on almost very fuel injected car for the last 20 years... if they could build cars without them they would.

A Pulsation damper is critical to the proper function of any EFI setup. Rapid cycling of the fuel injectors and fuel system components in a running engine combine with the non-compressibility of the fuel; and create high frequency pressure waves in the rail. These pressure waves can cause substantial variation in the fuel delivered by the injectors; causing numerous running problems that are difficult to trace, in addition to increasing stress on the fuel pressure regulator.