FMU removal

[NitroNixon]

How do I remove the FMU? It's been install on my car since I bought it. The last owner had a supercharger installed on the car before he sold it to me. How easy is it to remove this thing, and how much are they worth used?

I have reason to believe that it's making my engine run rich.

Or should I just purchase a adjustable fuel regulator and gauge?

[Coolbreeze]

If you aren't running a blower remove it. Its simple to remove, just get the fuel line disconnects and remove like you unhook you fuel rails. Just follw the lines from the FMU and you will see where it attaches to the factory fuel lines.

[PWR_RYD93]

There is no reason to have an FMU on your car if you don't have a blower or turbo. It's very easy to remove. Use the standard Ford fuel line removal tool to disconnect the FMU lines from the two places they connect (one line goes to the fuel rail connector, the other line goes to the connector on the end of the return fuel line). Then just plug the factory return fuel line back into the fuel rail. You'll have to trace the vacuum line that is connected to the top of the FMU back to it's source and plug it there. Then just remove the two screws that physically mount the FMU. You're done.

Generally parts like that are worth about half of their new value. Go to Vortech's website and see what a new FMU costs.

[NitroNixon]

Thanks everyone, so let me get this straight, this thing doesn't even work unless a blower is installed.

[PWR_RYD93]

That is correct. If there is only a vacuum signal or zero pressure sent to the FMU's top port, then it is just sitting there doing nothing. If you apply a boost signal (positive pressure) to the FMU, it will regulate fuel flow back to the tank, proportionately raising the fuel pressure in the fuel rails. Since you have no blower, hense no boost signal, it's just sitting there taking up space

[NitroNixon]

So should I just look into purchasing a regulator and fuel gauge?

[PWR_RYD93]

Try removing the FMU first since that doesn't cost you any money. See if your overly rich condition clears up. If not, get the adjustable regulator and gauge and try dropping the fuel pressure a few psi.

Oh, another free thing to check: make sure your fuel return line is not pinched anywhere. It's a hard line back to the tank and runs along side the fuel supply line on the passenger side of the car (very close to the rocker panel). Occasionally someone will accidently jack the car up and pinch that line. Fuel is then restricted back to the tank, so fuel pressure in the rails is increased. it's worth a look see.

[Ackbar00]

Originally posted by PWR_RYD93
Try removing the FMU first since that doesn't cost you any money. See if your overly rich condition clears up. If not, get the adjustable regulator and gauge and try dropping the fuel pressure a few psi.

The FMU should not be the reason that it is rich. The FMU works with postive pressure. No Boost, no FP increase. But get rid of it anyway

Get a adjustable reg. and a Guage. I have seen new regs on Ebay for $70, and the guage setup for about the same. DOnt get the real small guages (1 1/2), I had bad luck with them reading corectly.