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'95 fmu install

95'RS-T

Proven Member
441
1
Mar 10, 2009
Germansville, Pennsylvania
I'm getting a 12:1 FMU soon and i need a diagram on how to hook it up on a '95 eclipse from the FPR or where ever would be the easiest install. I was reading the install differs from the model years.
 

LD25Delta9

Proven Member
694
13
Feb 12, 2008
Ft. Wayne, Indiana
If you got one worth a damn, it'll have a diagram with it. If not, the fitting that comes out of the flat side of your FMU should run to your rail and the other (rounded side) to your filter. The 95-96's have the FPR on the rail. Next time do some searching. I know it's a pain, but this site has a ridiculous wealth of knowledge on it if you can stand to sift through all the BS threads.
 

kergilman

Proven Member
207
1
Oct 25, 2007
Portland, Oregon
Is it the cartech one like this?

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95'RS-T

Proven Member
441
1
Mar 10, 2009
Germansville, Pennsylvania
I have a new question and I been thinking about the 2 lines that come in on top of the tank the one on the left is the feed, and the one that slides on to the right is the return correct? EDIT: (If your looking at the lines from the drivers side back seat)
If I'm correct why couldn't I just T my FMU right there at the return line, and add a vac? Heres a Pic I did in ms paint just so no one is confused, or do i hook it up on the return line on the tank itself?
 

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kergilman

Proven Member
207
1
Oct 25, 2007
Portland, Oregon
I don't think that would work. Your FMU looks to be pressurizing the fuel tank via the return line. Where does your FPR fit onto that diagram above?
 

95'RS-T

Proven Member
441
1
Mar 10, 2009
Germansville, Pennsylvania
see I don't know. I thought I was hooking the FMU to the return line on the fuel pump cover so, i hooked it up in the back and tapped the vac source from the fpr. Should I just install it on the engine bay?.
 

VelocitàPaola

Moderator
5,069
153
Jun 14, 2005
Ft. Lauderdale, Florida
see I don't know. I thought I was hooking the FMU to the return line on the fuel pump cover so, i hooked it up in the back and tapped the vac source from the fpr. Should I just install it on the engine bay?.

Just install it like this (configuration #1 for a return type system, configuration #2 for a more stock system)...

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It doesn't matter where it's physically located, as long as the hoses go to the right places.
 

95'RS-T

Proven Member
441
1
Mar 10, 2009
Germansville, Pennsylvania
ok thanks but the return line on the fuel pump cover is the one I want to hook it up to right? or is it the one on the tank itself? thanks all im really confused about thanks
 

Dstarperformance01

Proven Member
816
130
Mar 5, 2016
Mustang, Oklahoma
I know this thread is dead but, I have a question to anyone that can help. My buddy bought a 420a that had the SFMU/FMU with it. It’s running lean and was curious as to how to address this or is there a problem? Thanks fo any help
 

VelocitàPaola

Moderator
5,069
153
Jun 14, 2005
Ft. Lauderdale, Florida
It depends on how lean it's running. The FMU adds fuel at a linear rate, but engines don't necessarily consume fuel linearly, so the discrepancy would cause a lean or rich condition. I would probably start by checking the fuel pressure and AFR with a wideband O2 sensor. If the engine is unsafely running too lean, the FMU can be adjusted by changing discs internally, and the S-FMU can be adjusted by changing discs and/or tweaking a couple of valves.
 
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