DAMN!!!
Well, it's almost working. I went for a tuning drive and after repeated burning of lower values in the "Boost Duty Targets" I still had unlimited boost even when the table was down to all 1's.

Then I remembered the thing about the circuit only being complete when the serial cable was plugged in... so I burned all the original "Brain" values back in and unplugged the serial cable... and I was back to wastegate only.

So, with the serial cable plugged in, the circuit is energized, with no cable, there is no circuit... I verified this with the cable plugged into the laptop and without... same result. There is no blue-LED effect this time, so what's going on?

PS: We need another thread title change.

I was just reading through another current EBC thread and found this page: https://www.miataturbo.net/showpost....97&postcount=6
My "Boost kpa Targets Table" is completely empty. The tps values in my "Boost Duty Targets" page are all 100%, but I see in KrazyRac3r's screenshot his tps values are scaled up the left side of the chart.

I still have the stock tps... but I know some guys have better luck with the BMW variable tps... is this something to consider?

The boost targets are for closed loop boost control. Not gonna happen w/o vari tps. You will have "unlimited" boost if all your duty cycles are set to 100%. You need to scale them back. 100% = full boost, 0% = wastegate boost. I don't know what Brainy locked your TPS to, so you'll need two rows, one for 0% throttle and one for 100% throttle. That will take care of you.

Sounds like something more fishy than user error to me. Sam, can you hear the solenoid clicking at all? During startup and otherwise?

sam make sure your settings look like this:

https://www.miataturbo.net/~web1_bra...parameters.JPG https://www.miataturbo.net/~web1_bra...am_targets.jpg

this will make sure your boost rises slowly as the RPM increase. to really test the functionality.

Try is both with and without the serial cable installed. If you keep getting crazy high boost really fast one way or the other, something is then causing a complete circuit and I'll probably need to good back over the board and make sure something isn't wrong, that shouldn't affect anything! remember, crazy high boost = valve working, meaning something grounded the circuit, otherwise with your switch you break the circuit and = wastegate pressure.

my RPM columns on your DC% targets, may always shoot you to high boost fast, because your turbo will spool faster than mine.


I might suggest trying to wash the motherboard down with alcohol before sending it back, make sure there isn't any random flux or hairs that could be causing a short or something, but it's odd everything else seems to work fine.


off hand: do you guys really hear your valve clicking like crazy on startup? I don't have a GM valve myself, but when it activates it's plenty loud. I never hear it....

^Roger... will try all that stuff. In the tps% column, mine look exactly like that, 0 at bottom and all others 100%.
I'll try inputting the values as suggested in the targets columns for a slow ramp-up of boost... but I had all the target's ZERO'd out on one test last night and I still made unlimited boost... so I suspect a short. We'll see.

But now I've got a bigger problem. I blew the dipstick out last night and coated the firewall, hood, back half of the motor, brake reservoir, etc... I cleaned it all out really well, can't even tell... but on startup this morning I had blue smoke... went for a 5minute drive, had moderate blue smoke when accelerating in or out of boost.

I pulled the plugs and they all look clean. Pulled the PCV valve and it checks good. I'll pull the hot-side pipe to make sure it's not compressor blowby. I've been running 12-13psi for a year now... I can't believe a few runs at 14psi toasted my motor. Gotta do a compression test, but did one about 5k miles ago and everything was in the 190's.

your pcv is dead.....again.

Man, I hope so... the "need a new engine" conversation with the wife is not gonna go good.

Doing a compression check now before I go to advance for another PCV valve... wish me luck.

SHOULD'VE WISHED HARDER... see new thread in General Miata forum.

Man I wish I had luck with mine.

No Lift To Shift (flatshift).