AEM Truboost Questions...

[Modern 3kGT]

The car is a 97 vr4... I was getting everything set up to do my EGR Delete when I relaized the routing of my AEM Truboost seemed kind of funky. It was previously installed on the car so I'm not sure whats really going on. I did some research but given where I'm at now I'm kind of confused.

Is this the stock boost solenoid I'm point at in this picture...?



One of the ports on what I think is the stock boost solenoid has just been left uncapped...



From the 2nd port on the aem boost solenoid the hose runs to an "X" fitting that plugs into the first vacuum line on the throttle body, plugs into the back of the plenum and then the last hose runs to my boost gauge. The 3rd port runs to the stock "H" Connector...



I'm so confused here.. please help me figure this out.

Pictures and/or diagrams would be greatly helpful...

Thanks, John

[mb3000]

If you're doing a full vac reduction than just look at the bottom, it's pretty easy.

3000GT/Stealth International Message Center

[Modern 3kGT]

Not doing a full vac reduction... I can't being OBD II cause I'll throw a code. I'm trying out oohnoo's method which seemed to work for him deleting out the EGR.

[guido1205us]

Car's in storage - forgot the setup but there is an AEM Tru-boost install guide at the other site.

I also have a 97 VR-4 and when I disconnected the stock boost solenoid (power) I threw a cel. I hooked power back up and was golden.

[Modern 3kGT]

Well I just unsnapped the connector and put electrical tap around the open end to protect it... I hope that won't throw a CEL.

[95gto]

I believe the OBDII cars will throw codes if you remove the boost solenoid, ie unplug it, but maybe its just the 99's that do that.

At any rate here is how you want to plumb your solenoid:
Port 2 should have a line leading to your wastegate actuators. You only need a t-fitting to properly plumb this line and the factory setup uses an h-fitting instead. You can resolve this issue by removing the factory h-fitting and replacing it with a t-fitting or by capping the extra line coming off the h-fitting.

Port 3 should have a line leading to the nipple on the back side of your y-pipe or charge pipe if you have you have an fmic. The key thing here is to pull a boost source that is pre-throttle body.

Your boost gauge tap should be made off of the intake plenum. The two best spots for this are either on the small nipple on the back side of the plenum near the throttle body or off of the slightly larger nipple on the front side of the plenum near the throttle body. You will probably need another t-fitting to tap into the existing vac line there. I would not recomend using any of the taps on the top of the throttle body itself.