VDI solenoid
Thread Starter
84 SE
Joined: Sep 2005
Posts: 1,002
Likes: 14
From: Summit Hill, PA
VDI solenoid
Hello everyone,
So 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 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!
So 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 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!
Ditch the emissions solenoid and go with an electric air pump. I tried this method and had mixed results as well. I got an electric air pump to force that thing open and I watched it work effortlessly. Unfortunately I think a big part of the problem getting the VDI to work is that the mechanism gets dirty, the chamber doesn't rotate as smoothly as it ought to and needs a bit more force to retract.
Ideally i think a kind of stepper motor would be better than the diaphragm style actuator used. Its just a whole other project to figure how to mount and program it to work.
Ideally i think a kind of stepper motor would be better than the diaphragm style actuator used. Its just a whole other project to figure how to mount and program it to work.
Thread Starter
84 SE
Joined: Sep 2005
Posts: 1,002
Likes: 14
From: Summit Hill, PA
I ended up getting an aftermarket 3 way air solenoid. I tested it yesterday and the VDI works. The solenoid cost me around 15.00. It vents the air after the rpm's drop below set point and allows the VDI to close. So far so good.
Thread
Thread Starter
Forum
Replies
Last Post
Kenteth
2nd Generation Specific (1986-1992)
11
Nov 14, 2003 05:42 PM