1987RX7guy

iTrader: (3)

It has everything to do with the connection of the fuel hose. It is just a non-dampening part unlike the PD itself.

RotaryEvolution

iTrader: (30)

PD strikes again! how could anyone who reads these forums not know about the horror of the PD failures? it should be the first thing any RX7 owner should check...

gingenhagen

But if I remove the banjo bolt, the fuel hose connection has not been changed. You want to switch out the piece that comes before the banjo.

1987RX7guy

iTrader: (3)

aparantly they are more concerned with their monzta tackoz! for that 11k rpm action yo lol


Seriously I still vote for a noob education program as part of becomming registered.

13b_drifter

Unfortunately, a new PD would cost as much as an aftermarket PD from Marren. Might as well buy the Marren PD which would likely last longer since it's made of aluminum.

oditot

how would I know it was going bad, my car smells a little like gas somtimes but I was under the impression they all do

gingenhagen

I wonder if there's any way a Marren will fit in a T2. I've seen the N/A writeup, but the T2's lines are reversed. Hmm...

BlaCkPlaGUE

The marren if friggen BIG, whether its the T2 or the NA, the primary injector rail is in the same place. I'm sure theres enoughe clearence for it without hitting the actual intake, but what im wondering is if its going to not fit cause the housings will be too close?

I'd email marren and ask them, im sure they've solve a few to seven owners

rs_1101

i want pics.

see the aftermath. anytime you get gas smell in the cabin/under the hood, its not good. odds are its causing headaches from the fumes.

gingenhagen

The archive's marren FPD retrofit covers how to do it for the N/A pretty well. Replace the old FPD with a banjo bolt and replace the banjo bolt (on the primary) with a -6AN adapter which will run up to the rear of the secondary fuel line and the marren FPD which is connected with an adapter.

Problem is, the T2's flipped so that the pressure regulator is in the rear, and there's no room to install the marren FPD (which is HUGE!!!) in the front of the secondary fuel line. I should know, I bought me a marren FPD and then had to pay the price of shipping and restocking when I saw it wouldn't work.

Then again, there's probably some way around it like if you swapped the pressure regulator to the front of the secondary fuel line and then ran lines from the front of the primary to the rear of the secondary or some convoluted garbage like that. I'm perfectly happy with my banjo bolt replacement.

Aaron Cake

iTrader: (1)

I'm trying to remember names, but several members have reported lean conditions and strange injector firing in high HP applications. Doubt it's a problem for most people, but why not fix the problem properly and keep a necessary component of the fuel system (show me an EFI equipped car without a PD from the factory)?

Because 90% of them propably do. There are a great number of RX-7s out there driving fine on original PDs. Also many other cars that use the same part without problems.

Maybe I'm weird, but I have never worried about my PD.

The part is made by Nippondenso, not Mazda. It's used in many different cars besides the RX-7. The screw does not move in and out during normal operation.

I totally forgot about the Marren PD. That's probably the best choice.

Also, the fuel rail from the S5 can be used which has an integrated damper. It's much less prone to failure.

digitalsolo

iTrader: (2)

My 1998 Grand Prix GTP doesn't have a PD factory, and the stock fuel system on it has proven good for ~600 HP with larger injectors.

I can see where you could run into problems without it in very high HP situations, but not in a typical RX7, there's just not enough load on the fuel system to make it an issue.

Aaron Cake

iTrader: (1)

Without going too much OT, that's the first one I've heard of. Are you sure? That's the 3800 engine, isn't it? My mom's Olds had the same engine with the PD located on the rear fuel rail...

I just did a quick Google search, and find several references to the PD on the 1996-1998 Grand Prix. Is the GP the semi-returnless system? That appears to be the only GM system without a PD...

digitalsolo

iTrader: (2)

The non-supercharged Series I/Series II engines, and the 99+ Supercharged engines have a PD on them. The 1997-1998 fuel system does not. The fuel pressure regulator is the only thing on the rails, and I know that it does not dampen the injector pulses. I've got an extra set of rails in front of me, that I'm looking at.