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Install a Fuel Management Unit (FMU)

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Old Jun 30, 2003, 07:24 AM
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Install a Fuel Management Unit (FMU)

First you need one of these. 12:1 FMU It is easily found on EBay one dude sells them outright for $99.99
Attached Thumbnails Install a Fuel Management Unit (FMU)-fmubig.jpg  

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Old Jun 30, 2003, 07:25 AM
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Next you need to find the location of the old one in your car. So here that is. This is if you are standing on the passenger side of the car and looking right above the alternator.
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Old Jun 30, 2003, 07:28 AM
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Here is what you need. Cordless drill is not necessary but it make it easier to drive screws into the firewall.

Needed but not shown is 2FT of 1/4" fuel line and 4 hose clamps. 1FT of vacuum line and a vacuum T.
Attached Thumbnails Install a Fuel Management Unit (FMU)-reqtools.jpg  

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Old Jun 30, 2003, 07:29 AM
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Ok we are ready to start. First let the pressure off on your fuel system like this.
Attached Thumbnails Install a Fuel Management Unit (FMU)-gas-cap.jpg  
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Old Jun 30, 2003, 07:36 AM
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Now we need to cut the 2FT of fuel line that you bought. Make one about 13in and the other 11in.

Attach the 11in to connection "B" on the FMU the 13" goes to "C"
Use hose clamps to keep them on.

Now you can mount the FMU here. Just screw it to the firwall.
Attached Thumbnails Install a Fuel Management Unit (FMU)-locnewfmu.jpg  
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Old Jun 30, 2003, 07:37 AM
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Lets hook up the gas now.
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Old Jun 30, 2003, 07:38 AM
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From points "B" to "C" there was a short fueline with spring clips on it like this.
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Old Jun 30, 2003, 07:42 AM
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Remove the clips with your needlenose pliers and throw that line away. A minute amount of gas wil spill when you pull this line off.

Put hose clamps on the hoses from the FMU and hook hose B to point B and hose C to point C and tighten the clamps.
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Old Jun 30, 2003, 07:44 AM
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Next is the vacuume line. You need to tap this hose, running from the intake manifold to the stock regulator. Cut it in half and install the T
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Old Jun 30, 2003, 07:52 AM
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Install the hose you bought from the tee back to connection A on the FMU and you are done.

Put the gas cap on and turn on the key wait for the fuel pump to come up to pressure and start the car.

This is not really a necessary mod for a NA car but very necessary for turbo. It also happens to be my fix for getting the car more gas at idle so it doesnt stumble when you flip on the lights or whatever. Most of you do not notice the stumbling, but for those of us with the aftermarket engine mounts we really feel it. And with this mod the vibrations at low idle with accessories on is almost non-existent.

Good luck

Discuss this install here.

Last edited by HobieKopek; Jun 30, 2003 at 08:07 AM.
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