Hi.
I own a 1994 VTEC gen4, and recently fitted a Skunk2 S2 IM, 68mm TB and generally just tidied the engine bay up a bit.
But....(theres always a but isnt there!), i am left with a solenoid valve, that appears to be a part of the vacuum circuit. It has an electrical connection that comes off the injector harness, and used to sit on the OEM fuel rail, on a metal clip. Now that I have an AEM fuel rail this is no longer able to be fitted there.
I have not connected it inline with the vacuum line, but connected it to the harness, as I dont want it to throw a CEL.

Does anyone know what this is for? I have accounted for all the other valves etc, but this one doesnt even show in the official Honda service books and supplements that follow.

Thanks in advance for any help provided!

 

I think your talking bout the EGR. You don't need it if that is what your speaking of!

 

Thanks for the reply, but it isnt that as I have relocated the EGR to the bracket that Skunk2 supply with the IM kit.
Just re-checked the vac diagrams and all that I currently have fitted to the IM / TB are MAP sensor, purge valve, VCV (vacuum check valve), Cruise vac feed, and one other that I really shouldnt have bothered reconnecting as it is not required (the EGR solenoid).

Just wondered if any other JDM cars out there had one of these fitted.
The valve it self is identical to the purge valve that is mounted to the firewall.

Doesnt seem to affect the running of the car at the moment, but was having vacuum leaks causing poor idle etc.

Any other ideas anyone - thanks for your ideas!

 

i take those off and throw them in the spare parts bucket.

 

take what off (assume you mean the EGr bits etc?)

 

soudns like its the fpr solienoid thingy that comes on JDM swaps, just take those off and dont worry about it.

 

what you are talking about has nothing to do with teh egr, its as eddie said related to teh fpr in japanland.

 

The FPr rings a bell. I will re-connect it to see what it does and if that results in nothing then I'll disconnect it. Not sure if it will throw a CEL light tho?

Thanks for all your help everyone.

 

It will not trigger a CEL.
I was wondering some time ago and asking if anyone had a JDM P13 pinout as one of the wires of this FRP solenoid goes to the A10 pin in ECU (this pin is empty on USDM and EDM ECUs).

 

Can I help in anyway? I can check my ECU tonight (UK GMT time) and leave a message on this thread for you?

 

Hmm, even if you check, you'll say the same- A10 pin. I'd like to know the purpose of this solenoid I know it messes with fuel pressure but wonder how.

 

I'll refit it tonight and post the results.

 

does the jdm motor have a normal vacume acctuated FPR? was this solenoid inline with the FPR?

 

My car uses the factory FPR, and from what I can now remember this solenoid wazs fitted inline with the vac feed to the FPR.
I am planning on replacing the factory FPR with a SARD one in preparation for the additional mods that I am planning.
Would the solenoid assist with the operation of the SARD FPR?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pentaq &raquo;</TD></TR><TR><TD CLASS="quote">Hmm, even if you check, you'll say the same- A10 pin. I'd like to know the purpose of this solenoid I know it messes with fuel pressure but wonder how.</TD></TR></TABLE>

i belive this thing is to help with starting or something, it will cut the vac to the fpr, to make it a bit richer or osmething while starting, or maybe not. i only assume this because the jdm motors dont have the air injection start vavlve thingy on the IM.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eddiebx &raquo;</TD></TR><TR><TD CLASS="quote">i belive this thing is to help with starting or something, it will cut the vac to the fpr, to make it a bit richer or osmething while starting, or maybe not. i only assume this because the jdm motors dont have the air injection start vavlve thingy on the IM.</TD></TR></TABLE>

Probably you're right here. I have removed that solenoid and don't have any problems starting the car though.

 

I just found an old photo of the engine bay and it shows the vac lines going to this solenoid and then onto the FPR, so I have reconnected it and have found no problems. Perhaps it is to do with the emissions system, cutting the vacuum to the FPR so that no fuel is left in the fuel rail?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtecbasher &raquo;</TD></TR><TR><TD CLASS="quote">Perhaps it is to do with the emissions system, cutting the vacuum to the FPR so that no fuel is left in the fuel rail?</TD></TR></TABLE>

Doubt it... It's even better if fuel is still in th rail. Easier to crank then.

 

actually cutting the vacumm to the fpr, will only raise the fuel pressure, and dump more fuel.

but yeah i removd my and have had no problems either, so i dobut its too important, heh

 

Before re-fitting the solenoid, my car used to take a few turns of the starter before it would fire into life. Now with the solenoid fitted, it starts instantly, and doesnt continue to run for 1 - 2 secs after switching off the ignition.
Maybe it is just my car, but it also appears to pick up better (no hesitation) in the midrange, but again this could be anything.

Thanks for all your replies though ppl!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">does the jdm motor have a normal vacume acctuated FPR? was this solenoid inline with the FPR?</TD></TR></TABLE>

yea pin a10 was able to control fuel pressure, im still not quite sure why they would do that though, did they not have enough control with the injectors??