2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Pic Request: Fuel Line on PD

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Old Nov 23, 2007 | 12:21 PM
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Pic Request: Fuel Line on PD

So a friends on his way to get me so we can go to his house and get a part off of his spare motor. I recently replaced the pulsation damper with a banjo bolt, and I guess I moved the fuel line that the bolt goes through around too much, because it's started leaking. If you wouldn't mind, I'd like a pic of that fuel line and where it exactly goes. I've tried searching for the past 15 mins and can't find much. All picture will be greatly appreciated.

Thanks alot guys

and here's a paint pic so everythings clear...





Thanks Guys
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Old Nov 23, 2007 | 12:25 PM
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FPD is the last thing fuel is supposed to hit before going back to the tank.

See it this way. The FPD will not open under....70PSI? When its opened the excess fuel goes back to the tank. So FPD is an outlet, not an inlet.

Last edited by Spectator; Nov 23, 2007 at 12:31 PM.
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Old Nov 23, 2007 | 12:28 PM
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Originally Posted by F.C.3S
Pulsation damper is the last thing fuel is supposed to hit before going back to the tank.

See it this way. The pulsation damper will not open under....70PSI? When its opened the fuel goes back to the tank. So FPD is the exit.
So are you saying that fuel line goes straight to the fuel tank?
Pictures please!
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Old Nov 23, 2007 | 12:36 PM
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Each line goes threw the rats nest before connection to the filter or the metal return fuel line.

Does that help you?

I cant provide a pic...

Position your rats nest where its supposed to go and figure it out. Its really easy.
Attached Thumbnails Pic Request: Fuel Line on PD-pulsationdamperpic.jpg  
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Old Nov 23, 2007 | 12:42 PM
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Originally Posted by F.C.3S
Each line goes threw the rats nest before connection to the filter or the metal return fuel line.

Does that help you?

I cant provide a pic...

Position your rats nest where its supposed to go and figure it out. Its really easy.
Alright, well I guess we'll just find out when we get to tearing at his parts motor. And about the pic, one hose goes to the fuel filter, and one to the tank? So which is the one going into the fuel rails? Sorry I dont know much, I've only replaced the pd and water pump, so I havent dig into the motor much

*And FC3S Pro made that second pic*
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Old Nov 23, 2007 | 12:53 PM
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Hope this helps you.

Thats called art.
Attached Thumbnails Pic Request: Fuel Line on PD-pulsationdamperpic.jpg  
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Old Nov 23, 2007 | 01:03 PM
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Originally Posted by F.C.3S
FPD is the last thing fuel is supposed to hit before going back to the tank.

See it this way. The FPD will not open under....70PSI? When its opened the excess fuel goes back to the tank. So FPD is an outlet, not an inlet.
Umm... I think you are confusing FPR (Fuel Pressure Regulator) with the FPD (Fuel Pulsation Dampener). The FPD is the first thing the fuel passes through before it enters the rail. The instream line goes from the tank, under the car via hardline, then to the high pressure filter (connected to the drivers side frame rail near the firewall) and then to the ratsnest, to the FPD. From there it goes through the rail to the FPR, and then back to the tank.

Trace the soft fuel lines from the drivers side of the engine down toward the firewall and the one that stops for the filter right around the frame rail is the instream and needs to go to the FPD on the primary fuel rail.
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Old Nov 23, 2007 | 01:06 PM
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Originally Posted by Craiger
Umm... I think you are confusing FPR (Fuel Pressure Regulator) with the FPD (Fuel Pulsation Dampener)
Indeed I am!

But my drawing is art, still.
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Old Nov 23, 2007 | 04:49 PM
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Originally Posted by F.C.3S
Hope this helps you.

Thats called art.
Lol that's cute.. It looks like a 3rd grader drew it.
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Old Nov 23, 2007 | 05:04 PM
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That paint drawing is ART! Even the rounded fuel line profile. Anyways, back to business.

Fuel goes...tank, low press filter at pump, pump, lines to the front, fuel filter, passes by Fuel pulsation damper, primary injectors, rubber line, secondary injectors, then past fuel pressure regulator, back to rats nest and back to tank.
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Old Nov 23, 2007 | 05:10 PM
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More like 2nd grade. most 3rd graders are leaning to include persective and dimensions into their art. In fact, I saved that pic to bring into work to show the little retarded kids that they aren't as bad off as they think. I'll show it to them and say, "See some adults can't draw nearly as well as you can." and they'll feel really good about themselves. Thanks!! all in jest.
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Old Nov 24, 2007 | 12:57 AM
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wait, is this an n/a or a T2?
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Old Nov 26, 2007 | 03:40 PM
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Profile shows 87 RX-7, no mention of TII, avatar shows NA TB.
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Old Nov 26, 2007 | 09:26 PM
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Originally Posted by pfsantos
Profile shows 87 RX-7, no mention of TII, avatar shows NA TB.
wordd

I've already taken the dynamic chamber off and replaced the line, put everything back together, deflooded it and gotten it running, but just to babble...

I guess I moved that line too much when I replaced the PD,
causing it to leak. I broke 2 more vaccum lines, and 3 were broken on the first removal. So about all of those are good now. And when I was trying to start it, it was hardcore flooded. So I had to pull the plugs and all. Anyways, thanks for the help guys. I now reccomend replacing that hose if your ever down into the rats nest, because if it starts leaking it leaks worse than the pd. Okay, well... thanks again.
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