Hello everyone,
As you may already know, I have the S5 intake on my GSL-SE with functioning VDI. What's been happening since I made the conversion is that the VDI works only for short periods of time. What happens is that, it appears, that the emissions solenoids that I use eventually can't hold the air pressure from the air pump long enough until the desired RPM's are reached. I've used up all the solenoids I have. Most of the ones I used work fine initially. They keep the VDI closed until 5500 RPM and then move the air pressure over to the other side of the solenoid when the Haltech triggers it to do so. So my question is why do these solenoids start out working fine but then eventually allow the VDI to open at much lower RPM's? My only guess is that I have the air pump pressure going directly to the solenoid, as opposed to going through the Air Control Valve like on the stock set up. I have tried the solenoids with the white dot (the actual VDI solenoid from an S5 rats nest) as well as the green, blue, and yellow dot solenoids. Most of the solenoids will allow the VDI to open way too early. But one of them, (can't remember which color) works as it should but then won't vent to allow the VDI to close. In light of all of this, do you think I should try to obtain another stock VDI solenoid (white dot) or is there an air pressure issue that the solenoids eventually just can't handle long term?
Thanks!

 

You miht want to cross-post this on he 2nd Gen forum as more of those guys would be familiar with the S5 intake. It could be an interaction with your SE air flow velocity using only 2 Fuel Inectors instead of the 4 staged injectors, but Im not familiar with your setup. Did you add staged EFI using the S5 system into a standalone ECU, Or are you using the stock SE Injectors?

Regardless, only a few SE guys have made the S5 intake swap, so you may get lucky finding one here.

 

Good info.....never thought of that. I'm only using the 2 primary injectors and no secondaries.

Do you know of any aftermarket solenoids that are similar to the stock ones that may work?

 

Dunno, man. You'll need to check with the S5 2nd Gen guys.

 

Ok. I did post there.

 

https://www.rx7club.com/build-thread.../#post11550876

CO2 tank based control for Aux Ports

 

Yeah, that's super convenient,...

 

Hey Longduck,
Does the VDI solenoid on the S5's use a 5v trigger from the ECU or 12v? I don't have the S5 FSM.

 

the Black/White wire is 12v and the ECU just grounds the other wire

 

Thanks bro!