I'm currently running a TurboXS Manual Boost controller. I decided that I want to go back to the stock solenoid for now before I get a tune. But I hooked it up and I'm only getting wastegate pressure. .8 bar = 11.6 psi. I've read that wastegate pressure is 10-12 psi. I've connected it back according to a drawing I saw in an earlier thread.

1 line from the boost source and 1 line from the wastegate T'd together to the solenoid. What I didnt do was test the solenoid from evoscan.

Is this a probable cause of the solenoid failure? Its plugged in, and i'm not sure if the solenoid is activating or not.


Any help will much appreciated. Thanks.

 

Stock boost solenoid will only work with stock lines that have the restrictor pills. You can buy the stock lines from STM

 

why would you put the oem boost controller back on for a tune? do you want to have stock boost? if that is the case I would just flash the stock map back onto your car, but as stated the car won't run that without the boost pill in the line. If you want ECU controlled boost get a grimmspeed 3 port boost controller

 

I want to go back to electronic boost control. I actually want to see where the car sits with the solenoid. I will order the GRIMMSpeed soon.

I need the pill? I didn't know that. Does it matter which one it goes to? The boost side or the wastegate side?

I thought maybe if I took it out it would help. Definitely didn't know that. I have the pill in my toolbox still.

Thanks!

 

I can't remember off the top of my head. Logically I would say the wastegate side

 

Tried it. Put the pill on the wastegate side...nothing. Put the pill on the boost side ...nothing. I think it's safe to say the solenoid has failed. Quick and possibly stupid question, but if I get the GRIMMSpeed 3-port, would I need to retune right away or is it fine? Because there are a couple of things I need to get prior to a tune.(TB shaft seals, intercooler, AFR gauge, new UCIP, down pipe and test pipe).

I'm assuming because the computer is programmed to a certain like that the 3-port should be fine with out tuning, it will just make boost hold smoother.

ALSO where the EvOscan take the boost reading from? Because I'm at 24psi at idle. Thanks!

 

The solenoid most likely didnt fail. Its most likely hooked up wrong and/or without the pills/lines in the right places.

You can only read Boost in EVOScan if you have an upgraded MAP sensor.

 

No a 3-port is not plug and play it requires tuning. Also you will need to pick up a MAP sensor (Evo X one is good up to 3bar and will plug right in) if you want to have PSI based boost control through the ECU. Otherwise it will be load based (ECU calculated load) which isn't really optimal. So again the stock boost control tables will not work with a 3-port without being tuned.

 

evoscan can only get a boost reading if you have installed a MAP sensor. The OEM map sensor we get in the US is only 1bar (if memory serves me). You can get one from a X that is 3bar and will plug right in and fit in the OEM location. If you need more then 3 bar there are Aftermarket options for that. A new MAP sensor has to be tuned also as the ECU is calibrated for the 1 bar.

 

I put the pill in, I made sure it was in correctly. It was basically the same as it came out. But I don't remember if it was on the boost or wastegate side. I might just order the stock lines to make sure they are in right. So a 3-bar MAP will be fine? I'll have to get one soon then.

And I know NOW the solenoid is working because with the car off I energized the solenoid via EvOscan. And it clicked open and close. So it's definitely getting power.

Thanks!

 

What are the disadvantages of hooking it up? I ask only because my friend is running the 3-port in his Subaru and I swore I was told to install it the day of a tune. But he said it will be fine.

So bottom line, is order a 3bar map sensor and 3-port GRIMMSpeed. Aye! Thanks for the helps guys!

 

+1 for the Grimmspeed unit They make quality products!

 

Worst case hooking it up without tuning could cause an overboost which could be really bad depending on your luck. I dont know much about how the subaru ecu goes about boost control, but on an evo it just wont work right without tuning. 3 bar in theory is good up untill 29.4 psi of boost at sea level. If you wanna make more then that then you need like a 4 or 5 bar.