I need to know two things. First -- there are some electrical clips that connect to the solenoids that control the turbos. Specifically, there is a group of them under the intake that are; Black, Biege, Brown, Orange, Blue, White and Green. According to vacuum line diagrams I have seen, I am to use only three of these. One connects to the "Solenoid Valve Turbo Control" another to the Solenoid Valve Charge Control" and the last to the "Solenoid Valve Charge Relief". My question is what color plugs are plugged into these three solenoids? If I am suppossed to use any of the other solenoids that plug into these wires, please advise. My second question is if anyone has part numbers for the solenoids. I don't know if I am even using the right solenoids since I don't know how they are supposed to vent.

 

search for vacuum hose diagram - that should contain the information.

on the other hand, what do you mean by "no boost after 4500"? what are your boost gauge readings? there are a lot of different problems and it may not be just your solenoids. for instance, it could be a leaky pressure tank.

-bill

 

There are actually 4 that you need. Two of them control are for "Turbo Cotnrol Control" and you need them both for the sequential system.

You can download the parts diagrams here:

http://www.mazdaformance.com/rx7parts.htm

Basically the solenoids are just 12v on/off switches. However, as they get older they can have different performances between hot and cold temps around them.

 

To wrankin: I have the vacuum lines hooked up properly. I am working off a diagram that I got off the forum that has been endorsed by many. What I mean by no boost after 4500 rpm is this. I get 10lbs of boiost or better up to the poiint of transition which is at 4500 rpm. At that point my booost should dip slightly then kick in the second turbo and continue to boost at about 10 lbs or better up to about 7000 rpm or so where it tapers off to red line. the second turbo isn't kicking in. All the actuators, relief valves, pressure chambers and vacuum chambers were working perfectly before tear down. The car only has 34k on it. When we taking the emissions off, I left my son to it for about 30 minutees. He pulled the connectors off the solenoids, broke some and labeled nothing. When I came back, I couldn't tell which solenoid was which or what color electrical connector they wre suppossed to be plugged into. Long story short:

1. Vacuum lines are correct.
2. Don't know if the solenoids that are not broken will work where I am using them.
3. Don't know if i am using the right plug ins.

Solenoid Valve Turbo Control plugged into Brown plug
Solenoid Valve Charge Control plugged into White plug
Solenoid Valve Charge Relief plugged into Black plug
Solenoid Valve Wastegate Control and Turbo Precontrol attached at front of UIM. One has a solid black wrapped wire, (turbo precontrol). The other has a brown section at the end of the wire, ( wastegate control).