Hey All,

I have been using a Tactrix 3 port boost solenoid but it seems that its not actually controlling boost pressure as I have had some nasty 30lb spiking and knock as a result.

The plumbing to the controller was correctly installed and I tried pulling WGDC down to 0% and target load down to 100 but still spikes pretty badly.

In the end I bypassed the solenoid and running directly to wastegates and boost only goes as far as 7lbs holding at 5-6lbs steady.

What pins on the Chrome ECU v2 for 91-93 GTO are used for the boost control?

As far as I am aware the solenoid pulls the signal to ground in the circuit within the ECU. Is there a way I can test this ground circuit?
I have already had a large amount of other wiring issues that I have had to sort through and it would not surprise me if I had wiring issues for the boost controller also!

Aside from this trouble when I ran the car on just wastegate boost I found the car running sweet.

Virtual Dyno pulls that were recorded on the same stretch of long flat road has my car at 207kw 473nm torque on wastegate boost.
See below

VD%203rd%20gear%20WOT%20Wastegate%20Boost.jpg