FMU being non boost dependant, how to fix?

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Old Jan 29, 2003 | 08:45 PM
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Default FMU being non boost dependant, how to fix?

well the boost dependant fuel pressure regulator is keeping fuel pressure at 125-150psi all the times no matter what. whats wrong with this thing???
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Old Jan 29, 2003 | 08:58 PM
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Default Re: FMU being non boost dependant, how to fix? (Jockobo)

Remove it. Walk to the nearest trash bin, and drop it in. Pick up the nearest phone and call Hondata. That's a sure fire way to fix it.
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Old Jan 29, 2003 | 09:23 PM
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Default Re: FMU being non boost dependant, how to fix? (Jockobo)

Do you have it hooked up correctly?
Have you opened it to see if everything is inside? (washer, diaphram,spring, retainer)
Sounds like you have it hooked up backwards.
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Old Jan 29, 2003 | 10:16 PM
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Default Re: FMU being non boost dependant, how to fix? (tzsir)

Remove it. Walk to the nearest trash bin, and drop it in. Pick up the nearest phone and call Hondata. That's a sure fire way to fix it.
Hondata will fix a discarded FMU??
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Old Jan 29, 2003 | 10:18 PM
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Default Re: FMU being non boost dependant, how to fix? (b16ahybrid)

Do you have it hooked up correctly?
Have you opened it to see if everything is inside? (washer, diaphram,spring, retainer)
Sounds like you have it hooked up backwards.
Im thinking the absence of the spring would be most likely... with no pressure to hold the diaphram out, it will think its under full boost pressure and hence full fuel pressure..

Although there could be a few more reasons...
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Old Jan 29, 2003 | 10:57 PM
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Default Re: FMU being non boost dependant, how to fix? (Jockobo)

sounds like its stuck, . FMU's
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Old Jan 30, 2003 | 06:45 AM
  #7  
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Default Re: FMU being non boost dependant, how to fix? (LsTurbo91)

fuel goes in from the side and comes out from the bottom rite?
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Old Jan 30, 2003 | 07:25 AM
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Default Re: FMU being non boost dependant, how to fix? (Jockobo)

With the vacumme port on top fuel goes in the side and out the bottom
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Old Jan 30, 2003 | 07:49 AM
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Default Re: FMU being non boost dependant, how to fix? (b16ahybrid)

I have 2 different FMU for sale, 1 Vortech and 1 Cartech. Prices are negotiable.

https://honda-tech.com/zerothread?id=400558
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Old Jan 30, 2003 | 09:23 AM
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Default Re: FMU being non boost dependant, how to fix? (LsTurbo91)

sounds like its stuck, . FMU's
Yes this sounds like what is going on. If your going to use a FMU, look into the cartech 2005 units. A very nice FMU, which is adjustable.


[Modified by lshatchturbo, 1:24 PM 1/30/2003]
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Old Jan 30, 2003 | 11:47 AM
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Default Re: FMU being non boost dependant, how to fix? (lshatchturbo)

sounds like its stuck, . FMU's

Yes this sounds like what is going on. If your going to use a FMU, look into the cartech 2005 units. A very nice FMU, which is adjustable.


[Modified by lshatchturbo, 1:24 PM 1/30/2003]
funny you say that...my friend ditched his cartech for a vortech

try taking it apart like they said
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