Honda Prelude All Model Preludes

what is this on my fuel rail

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Old Oct 10, 2007 | 08:12 PM
  #1  
DVS Luder's Avatar
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Default what is this on my fuel rail

i bought the car years ago with this thing on my fuel rail. i never noticed it til i went turbo. a friend helped me out and he had the same car and so i pointed out how his was different.
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Old Oct 10, 2007 | 08:37 PM
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Is there anything attached to it underneath?
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Old Oct 10, 2007 | 08:40 PM
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Default Re: (mgags7)

yeah, a banjo style fitting in which the fuel line from the fuel filter is connected to. here is an over all pic so you can see where it is
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Old Oct 10, 2007 | 08:42 PM
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The fuel line doesn't connect on the left side?

That could just be a cap over the bolts. Never seen it before.
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Old Oct 10, 2007 | 08:43 PM
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Default Re: (mgags7)

ill take new pics to show whats under whatever the hell that thing is
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Old Oct 10, 2007 | 09:50 PM
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FBI tracking device.
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Old Oct 10, 2007 | 10:42 PM
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Default Re: what is this on my fuel rail (DVS Luder)

Does this sit on top of the banjo bolt or does it replace it? I can't really see from the pictures. Maybe it's a fuel pressure gauge adapter???
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Old Oct 10, 2007 | 11:09 PM
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Default Re: what is this on my fuel rail (bunkass)

JDM or USDM?
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Old Oct 11, 2007 | 02:41 AM
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Default Re: what is this on my fuel rail (DVS Luder)

i think it's the traction control urmm.. 'thingy' on the fuel line that restricts fuel

Gavz
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Old Oct 11, 2007 | 03:25 AM
  #10  
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Default Re: what is this on my fuel rail (gavzter)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gavzter &raquo;</TD></TR><TR><TD CLASS="quote">i think it's the traction control urmm.. 'thingy' on the fuel line that restricts fuel

Gavz</TD></TR></TABLE>

Now that is a good suggestion. 4th gen JDM h22s always come with the little vacuum diaphragm in line with the FPR vacuum source, which I also assume is for TCS.
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Old Oct 11, 2007 | 07:21 AM
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i'm guessing a Fuel pressure sender, for a gauge. at least that's what it looks like to me
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Old Oct 11, 2007 | 07:24 AM
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Fuel pulse debouncer... almost like a shock dampener to keep the fuel pressure consistent as the injector pulses...

what Gen lude is this?
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Old Oct 11, 2007 | 07:34 AM
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Default Re: (Dangger)

looks like a nitrous kill switch ..For when the fuel pressure is too low
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Old Oct 11, 2007 | 07:36 AM
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Default Re: (Pullig)

its not the jdm tcs "thingy" its smaller and looks a bit different than that. got 1 those in my garage.
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Old Oct 11, 2007 | 07:39 AM
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Default Re: what is this on my fuel rail (mgags7)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">

Now that is a good suggestion. 4th gen JDM h22s always come with the little vacuum diaphragm in line with the FPR vacuum source, which I also assume is for TCS.</TD></TR></TABLE>

that thing is to richen the mixture or osme crap during startup, it has nothing to do with TCS. think about it, how are you going to cut fuel by cutting off vacuum to the fpr and increasing the fuel pressure?
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Old Oct 11, 2007 | 08:04 AM
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Default Re: (Pullig)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pullig &raquo;</TD></TR><TR><TD CLASS="quote">looks like a nitrous kill switch ..For when the fuel pressure is too low </TD></TR></TABLE>

Did the previous owner tell you that he was using nitrous?

Because that's a Hobb's pressure switch that kills the nitrous system when fuel pressure gets below a certain pressure level.

See reference:


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Old Oct 11, 2007 | 08:35 AM
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^^^ bingo!

that's a fuel pressure safety switch. that car probably had nitrous on it at one time or another.

looks just like the switch from my nitrous express kit. cuts nitrous off if fuel pressure is too low.
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Old Oct 11, 2007 | 09:06 AM
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Default Re: (DOHCVTEC190)

lol i would be upset if i bought a car with that on it. some people are dumb with nitrous
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Old Oct 11, 2007 | 09:46 AM
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Default Re: (M2B4)

its a 5th generation prelude. damn i didnt know it had nitrous. the motor passed all the test tho, compression test, leak down, etc.
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Old Oct 11, 2007 | 09:50 AM
  #20  
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Default Re: (DVS Luder)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DVS Luder &raquo;</TD></TR><TR><TD CLASS="quote">its a 5th generation prelude. damn i didnt know it had nitrous. the motor passed all the test tho, compression test, leak down, etc.</TD></TR></TABLE>

You got lucky. Is it still the original motor? Otherwise, he probably didn't use it too often, or used a small shot.

But it's still shitty that he didn't disclose the fact that there was a nitrous kit on the car prior.
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Old Oct 11, 2007 | 04:07 PM
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Default Re: (Finest)

nitrous is great but yeas peoplke can be dumb but can i say that nitrous is ****** sweet again?
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Old Oct 11, 2007 | 04:09 PM
  #22  
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Default Re: what is this on my fuel rail (Eddiebx)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eddiebx &raquo;</TD></TR><TR><TD CLASS="quote">

that thing is to richen the mixture or osme crap during startup, it has nothing to do with TCS. think about it, how are you going to cut fuel by cutting off vacuum to the fpr and increasing the fuel pressure? </TD></TR></TABLE>

eh. D'OH.

I never really thought about it, just ditched it.
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Old Oct 13, 2007 | 07:36 AM
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nope all wrong. fuel pressure regulator!! ring any bells
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Old Oct 13, 2007 | 07:47 AM
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Default Re: (dustin_bb6)

had that on my old motor, then I didn't really know what it was and never asked, but a few weeks later, I was cleaning my car out and found 1/4 mile slips under my drivers seat, and turns out they were mid-13's on this "I thought stock" motor. It could be, it couldn't be. Try contacting the guy and see if he had nitrous on it, if not, call honda

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Old Oct 13, 2007 | 06:33 PM
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Default Re: (dustin_bb6)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin_bb6 &raquo;</TD></TR><TR><TD CLASS="quote">nope all wrong. fuel pressure regulator!! ring any bells
</TD></TR></TABLE>
That's definitely not a fuel pressure regulator! It's more like a pressure switch.
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