I have removed my stock boost controller from my '98 GSX so that I can install a GFB G-Force II in its place. Everything works as it should and the boost controller has been plumbed-in the same way the stock boost controller is, however I am certain that the ECU has no idea what is going on and can't figure out why it can't control boost.

I read an article on ecmtuning ( https://www.ecmtuning.com/wiki/bcsinstall ) that stated the next step is to use the old plug for the stock boost control solenoid to wire-in the aftermarket boost control solenoid to the ECU in its place, however the GFB G-Force II system I am using is a little more complicated than your average boost controller ... here is a rough break-down of my setup and a link to the wiring diagram from the manual just to be on the safe side ( http://www.gfb.com.au/phocadownload...ion-instructions/G-Force2-Instuctions-web.pdf )


According to ecmtuning I would just wire the positive into the positive and the negative into the negative so that the wiring for the stock boost control solenoid would be spliced into my aftermarket boost control solenoid, however I have control over my boost control solenoid via the boost controller which is mounted in the cabin.

If I was to use the electronic boost control solenoid as a replacement for the stock boost solenoid, would I have to rewire the boost control solenoid to take switched power and ground from the wiring plug for the stock boost solenoid and thus make the boost control solenoid not controllable or connected in any way to the boost controller in the cabin (see setup A), or could I simply 'tee' the stock plug wiring into the positive and negative wires coming from the boost controller and have both the ECU and the boost controller in the cabin control boost (see Setup B)?

Truthfully I suspect that the answer will be that I have to loose controllability of the boost control solenoid using the boost controller in the cabin which I assume is because the ECU always needs some way of controlling boost, right? And by having both the ECU and the boost controller have tuneability over boost, would I be correct in guessing that the two would likely fight eachother for control? And one last epiphany before I end this post; now that I am using ECMLink and have a way of controlling the boost in an effective and finely tunable manner throughout the full rev range using the ECU rather than a mildly adjustable EBC that can only make simple adjustments that do not correlate to ECU values much at all, should I just delete the EBC altogether since its not really effective or useful anymore?

SETUP A




SETUP B

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Those directions are for wiring in a solenoid that the ECU controls. If you wire your solenoid that way, you will not be able to use you EBC in car unit.

It is my understanding that the ECU doesn't care what boost the car sees as long as the air is measured properly by MAF of SD. This is why a manual boost control works without issue. If you want to keep your EBC, just leave it wired into the car without wiring it into the ECU. It should work fine.

I personally use the stock boost solenoid with a restrictor in the line and I have had no issues.

The only reason I have the EBC anymore is as a safety net, so if I want to drive the car in a 'limp mode' of sorts or want to enforce a boost cut-off I can do so without needing to have a laptop by my side. So in short, will the ECU care if it has control over a boost solenoid or not? And what should I do with the remaining disconnected old plug?

I think, correct me if I’m wrong since it’s been a while, that the factory plug remains plugged in to the factory solenoid. Otherwise, it’ll turn on the check engine light.

I didn’t do anything special when I installed my Blitz SBC iColor. The computer didn’t seem to care.

I removed my factory boost controller altogether and haven't gotten a CEL I didn't want it sitting in the way so I just have the disconnected plug tucked behind a couple other wires and secured