Ok. I'll put the wga back on pcm control. What's the best process for getting the 20psi boost levels?
If you're trying to use an FM or S2 WGA on a stock or Stage 1 PCM with the 93tune it's not going to work right out of the box. The 93tune on a stock or S1 PCM assumes that you're using a stock WGA so the wastegate duty cycle is scaled for that WGA alone and PCM WGDC% learning is disabled. But there's a trick to get it to learn the correct WGDC% to operate an FM or S2.
1.) Boost leak test the system, tbolt hose clamp and ziptie all the lines making SURE everything is tight. If you don't have a boost leak tester you will need one to complete this step, just tightening things up isn't enough to be positive there are no leaks.
2.) Run a single vacuum line from the turbo housing directly to the WGA then set the arm so that it boosts to 8-9psi. Keep tweaking the arm until it's good.
3.) Hook the vacuum lines back up on PCM control as stock through the WG solenoid.
4.) Load the factory stock or Stage 1 tune back on the PCM, start the engine at least once.
5.) Reset the PCM by pulling the negative lead off the battery for a minute.
6.) Drive the car around doing some WOT pulls for a while until the boost levels stabilize and become predictable (this is the learning process).
7.) Load the 93tune without resetting the battery.
8.) With the handheld, set up your desired boost level to what you want to hit in 3rd or 4th gear, set up your AFR to your target in 3rd or 4th gear, datalog for knock (adding fuel or pulling timing as needed to make sure ST knock never goes over 1 count).
If you have to reset the battery for any reason, write down your DSP settings and repeat the whole process again from step #4.
If for some reason you just can't get the car's boost level dialed in you can make things easier by getting a rescale tune for the FM or S2 WGA by PMing "Turbo666".