Help Needed Epa Test Troubles

[NVMYTG]

my r33 gtst needs to pass an EPA test and to do so i need to have standard boost control parts running. at the moment i have a duel stage boost controller and it runs fine with the duel stage. when i put the vac lines to the standard controller it overboosts. can someone tell me what vac lines need to go where? also i have made sure the plug that comes from the standard controller is plugged in and i have even tried another one from a mates car. could the wiring for the standard controller be used for the aftermarket unit? if so what should i be testing for with the multi meter? the after market controller has an earth wire and a wire running through the firewall and i cant see if the wire from the standard plug has been cut as it dissapears into a loom. any help would be much appreciated. thanks, brad (also my car has a standard turbo,FMIC and at the moment the airbox is fitted and i have checked for vaccum leaks)

Edited July 27, 2006 by NVMYTG

[RANDY]

You won't need a multimeter... the standard solanoid should give 5psi if it's not working properly, and 7psi if it is.

I suggest that your plumbing is not quite right... from the intake pipe down the bottom, the pipe should come into the bottom of the solanoid (I think.. if not, switch them around), and then the top one goes to your wastegate actuator.

[NVMYTG]

i treid the lines both ways but i was a little worried id do some damage can anybody confirm which way they are supposed to go? also id like to know what im looking for with a multimeter with the wires coming from the solinoid as i said before i tried the vac lines both ways and i even tried another solinoid from my mates car which i know works.

[NVMYTG]

can anybody help me out???

[Mick]

from memory one of the lines was running to a T peice, also one line had a little restrictor in it, if thats not in the right place that may cause your problem.

Let me work out what needs to go where cos im in the exact same boat as you, i have a dual stage boost controller installed and i need to put the standard one back on so i can get it trough RoadWorthy.

[NVMYTG]

yeah if you can get it working let me know because im having trouble lol. i also tried it with a t peice from the line from the actuator and the pipe under the cooler piping and another one from the intercooler piping

[Mick]

Ok here is what i worked out on how to properly install the stock boost controller.

First off there is a hose from the actuator goin to a T peice, its only short and it has a yellow band on it because it has a brass restrictor in it.

From the T peice it goes to the BOV retuirn pipe.

Then from the T peice it goes to the bottom of the boost controller.

The last is a straight hose goin from the intercoller pipe to the top of the boost controller.

Can someone please confirm this for me, i just want to be %100 sure.

I mainly want to know if the restrictor is in the short hose coming off the actuator and goin to the T peice.

I hjope this helps, im %99 sure this is right which i would love someone to confirm this all for me ..

[mad082]

no thats wrong.

(if you have a front mount there will be a hose from the bov pressure line (the vacuum hose that opens the bov) instead of the intercooler pipe)

there should be hose hose from an intercooler pipe. this goes to a T piece. from the T piece there should be 1 hose going to the wastegate, and 1 to the lower hose of the factory solenoid. the top hose of the solenoid should go back to the intake (bov plumback pipe).

Edited July 29, 2006 by mad082

[mad082]

here's a quick diagram i did up.

[Mick]

Ok this is straight from the Nissan Fast program, so thjere is no disputing it.

Top of the boost controller goes straight to the wastegate.

The bottom goes to the T peice.

One side of the T peice goes straight to the intercooler pipe.

The other side of the T peice goes straight to the BOV return plumbing.

Thats it, 100%..

[Mick]

I also found a picture in another thread showing the stock setup i described.

The restrictor is in the short hose goin from the intercooler pipe to the T peice, make sure you have the restrictor in place.

http://www.skylinesaustralia.com/forums/in...st&id=45802

Edited July 29, 2006 by Mick

[NVMYTG]

thanks alot for your help dude ill borrow my mates vacum lines with the restrictor and t piece and hook it all up and let you know how i go. thanks alot for your help its much appreciated

[NVMYTG]

i got it running as per micks instructions although i dont have the vacuum line with the restrictor in it and it seems fine

[RANDY]

Mine didn't have a restrictor when I removed it and put the manual controller on? Good to hear you got it sorted!

[Mick]

No worries, glad i could help.

It will still work ok without the restrictor, all the restrictor does is make boost come on a little quicker.