how to hook up this fmu?
Thread Starter
0.0 BAR
Joined: May 2004
Posts: 15
how to hook up this fmu?
so, i bought this fmu off from ebay, a used one, me and my brother trying to put it in my 93 celica, we running a 14b,since it used it has no instruction, i see one is the vacumm line am i correct? which vaccumm line should we split it to? and what about the other two nipple sticking out? where do we connect it to? 
Thread Starter
0.0 BAR
Joined: May 2004
Posts: 15
Re:how to hook up this fmu?
ok my brother is not exactly a car freak neither, so when i told him what you told me. He had no idea, so can you go more specific, and he said where to the fuel tank? well if you guys have any pic it would be supper thank you :P
Administrator
Joined: Dec 2002
Posts: 13,988
Re:how to hook up this fmu?
Off your fuel pressure regulator that is a FUEL RETURN LINE, this line goes back into the fuel tank (fuel that is not used from the rail)
go about 6 inchs back (or whatever you want) cut the line in half. In the middle of the FMU there should be 2 barbed fittings about the same size, Do as jeff said, the middle one should be the Return line (meaning going back to the tank) and the Other line will go to the other fitting (line in). The little small nipple will go to a intake manifold vac source.
Jeff
go about 6 inchs back (or whatever you want) cut the line in half. In the middle of the FMU there should be 2 barbed fittings about the same size, Do as jeff said, the middle one should be the Return line (meaning going back to the tank) and the Other line will go to the other fitting (line in). The little small nipple will go to a intake manifold vac source.
Jeff
0.5 BAR
Joined: Apr 2004
Posts: 65
Re:how to hook up this fmu?
ok mine also just arrived yesterday, it also have no instruction since i bid it used on ebay. im not sure which one is feed and return but there a 2 barb said in and out. and as far as the fuel line back to the tank so i have to weld a nipple on the tank? like the oil pan?
0.5 BAR
Joined: Apr 2004
Posts: 65
Re:how to hook up this fmu?
im sorry guys, spare with me but i still doesnt get the concept of return line. so the line out go straigh to the fuel tank? which mean that i have to tab a nipple to the fuel tank like the oil pan and run a line? 
1.0 BAR
Joined: Jan 2004
Posts: 273
Re:how to hook up this fmu?
try looking around your fuel rail. There should be a hose of some kind leading back to your fuel tank. Just disconnect that and hook it up to the pic where it says fuel out. and get another hose and hook it from the picture that says fuel in to the fuel rail. Tada your done
