Changing Fuel pulsation dampener
 

I've been smelling fuel from my FC lately. I thought it was no big deal..until I saw gasoline pooling on my Engine!!!

I need to get this thing changed ASAP. What should all be changed when I'm doing this. the fuel line from the driver side of the engine to the FPD was dripping as well, though this may have been run off from the FPD. The FPD was making drips at about 3 second intervals. Wish I'd have noticed the severity sooner.

My main question is what parts should I change when I am doing this, and any idea how much time to set aside for the operation?

also, anyone have a suggestion to get the best price on an FPD. MY local mazda can do $137.

One of the forum sponsors has good prices:
http://www.mazdaformance.com/contact.htm

Go on google and search for "Marren pulsation dampener"

I think its at www.injector.com if that doesnt work google it.

The Marren is superior to the OEM? will it work on our cars well? I just don't want to have to replace the thing again soon, and I have doubts about removign it via the banjo-bolt method. I better take the day off work to get this done...

The fuel lines could also be leaking at the connections with the metal lines. Good idea to change the rubber lines (with fuel injection rated ones) and the clamps (use screw clamps, not the stock ones).

hugues -

To replace th PD, all you need is another PD. You could replace the lines too, but I dont know how big a job that would be. The job itself shouldnt take too long as long as you can take off and replace the UIM. I'd say its a 3 hours job if youve never done anything with the UIM before.
Just be very careful with the electrical connections to the injectors, make sure you unclip them before moving the secondary fuel rail.

Also, you could try www.mazdatrix.com for the part. Thats where I got mine.

okay, I'll pick up the fuel lines too then. anyone else know of this Marren FPD. I am curious, as it costs less, and looks to be of high quality, and claims to be the only PD I'll ever need to buy.

I'm going to fit it to my car

What you'll need, besides the Marren FPD, are some fittings.

You need a 3/8 NPT male to -6 AN male adapter, a 14M x 1.5 male to -6 AN male adapter, a -6 AN female tee, a -6 AN male to -6AN male fitting, and a barbed -6 AN fitting, plus teflon tape for the NPT adapter. A 12M x 1.25 banjo bolt will replace the OEM PD at the primary fuel rail.

Those fittings will allow you to mount the Marren FPD at the inlet of the secondary fuel rail. There isn't enough space at the original location to do it. You will have clearance issues with the intake manifolds, the water pump housing, and interference with the OMP rod.

Marren's FPD is made from billet aluminum, with the 3/8" female inlet on the bottom side, and a 1/8" NPT schrader valve on the side, which can be easily replaced with a fuel pressure gauge or pressure sender (I have a liquid filled pressure gauge installed on it).

There are no other inlets or vents of any kind, so in the event that this FPD fails, it won't leak, plus, it's rebuildable.

As for how it performs, I have no answer for you because the engine hasn't been installed in the car yet, and I'm still waiting on the tee fitting.

http://fc3spro.com/TECH/FAQ/pd.html


-Ted

i did my PD over the course of 2 weeks, but that was just because i didnt know what i was doing and work made it hard for me to catch daylight long enough to really get cracking. it wasnt too hard, just remember to de-pressurize the fuel system before you start, otherwise youll have fuel everywhere.

I already have fuel everywhere....
Does anyone know if I can buy the Marren at any parts stores, or do I need to buy it through the website?

Well, I got the UIM off, and found the fuel line running to the banjo bolt for the FPD was not on completely. I was noy slipped over the lip on the nipple correctly on either side. I'll replace this line.

IS there a way to test the FPS when it removed? It is possible al the leaks came from that fuel line, and not the FPD.

You mean the FPR? Easy way to check it for internal leakage would be to remove the vac line off of the upper half with the system pressurized, if you get fuel (or the vac line is wet internally), it's shot...

I have the Fuel damper removed right now, But I'm not sure if it is bad, since the fuel line was so screwed.

Is r=there no way to test it once it's off?

I'm going to put in the marren FPD like cluosborne did. My car is an 88 SE, so which if the 3 part numbers shown on the FC3Spro.com link page should I get from summit?

I'll be safe from fire until I get the MArren and all the parts to do it with the banjo bolt, but I don't want to go without an FPD permanently.