Car's an 87 t2. My car has been an ongoing build for the past summer, so I forget! There's 2 white connectors, in behind the uim, near the secondary fuel rail, dangling beside the transmission. There's one unit piece (sorry, searched fsm dont know what it is) that's connected to the uim that has a white connector on it. This is the only connector that may connect to one of the other 2. But what about the other connector? How do you decipher which connector goes to which?


Link to the "unit piece" make my question easier:
The picture i'm referring to is the second picture, 77U04B-187. Dangling connector, quite obvious. Page 86.

http://www.teamfc3s.org/main/factory...TEMS_TURBO.pdf

 

Looks like ones goes toward the AWS and the other toward that solenoid near the EGR valve, i believe those plugs are a bit different.

 

The picture shows the ASV (air supply valve), so one plug in the area will be for it and the other is for the AWS valve. Match the wire colors with the wiring diagrams to plug them in correctly. The AWS valve is called the air bypass solenoid valve in the FSM. You can actually see both valves on pg. 67 in your link.

 

Nice find! Thanks guys...

I have emissions removed. So do I need this ASV? I guess I can go ahead and remove the AWS valve as well? Considering i'm not running aws. Yay I get to search for another block off plate, oh joy. I'm running a greddy fmic, so AWS is unwanted.

 

Ttt

 

You can remove both. The ASV supplements the BAC valve under P/S & A/C loads on TIIs only. NAs don't have this valve at all. I don't run one on my car, but it's mostly because I don't have the wiring for it. My idle speed has still been relatively stable without it, but I do have the BAC in place.

 

I believe the series 4 turbo cars were the last to have an air supply valve. I know the s3 GSL-SE had it. I'm pretty sure s5 did not. FD definitely does not have it.

and now with drive-by-wire the Rx-8's have eliminated all that extra idle control bullshit

 

The S4 NA's actually do have an Air Bypass Solenoid valve, on the same side and to the rear of the BAC valve on the dynamic chamber. Function is similar as described.

 

The ASV isn't the AWS/ air bypass solenoid. Separate functions. All US-spec cars have the bypass solenoid for cold start emissions (3k RPM idle B.S.).

 

All US spec cars have AWS? I thought only s4 had it?

Thanks for your help man.

 

Nope, S5s too. That's actually where the name AWS comes from. In the S5 FSM (F1-41 or F2-39) it's called the Accelerated Warm-up System (AWS) solenoid valve, instead of Air Bypass solenoid valve.