I've got a small issue thats been bugging me, and i'm trying to get to the bottom of it, so i'm here to pick your brains.
The Evo II 63t has been running in the Satria since November and whilst run in, boost has been controlled straight off the wastegate. The car is using all standard E2 ECU, intercooler and piping, standard intake/airbox etc.
Yesterday i hooked up the stock boost control solenoid and relevent vacuum lines hoping to run the standard 12-13psi.
There's one line off the nipple on the cooler piping, to the top port on the solenoid, then from the bottom port it goes to the wastegate.
Took the car for a spin, and it freeboosted past 1.2bar and i backed off. Drove it back into the garage and started troubleshooting.
First was to make sure all vacuum lines were still attached and plumbed correctly. Check.
Next i removed the solenoid from the car and tested it. I tested it by putting 12v across the terminals and blowing air through it. Remove the 12v and air couldn't be blown through it, hence solenoid was opening and closing as it should.
I started to think why the solenoid wasn't opening and thats when i realised the ECU should have stepped in at roughly 15psi and delivered boost cut.
So it looks like the ECU isn't completely reading the air going into the motor as theres no solenoid trigger and no boost cut. But where does the ECU get its source?
I've spoken to a couple of trusted guys about it, with both mentioning the ECU gets its signal from the volume of air measured through the MAF. This makes complete sense, though i'm still not convinced this is the only source for the ECU as the AFR's appear to be all normal.
In my travels, upon removal of the turbo intake piping (MAF-turbo) i noticed theres a small hole just below the j-pipe. Its definately supposed to be there, and looks like factory intended. With nothing in it, its obviously sucking in unmetered air, so what goes in here?
I've swapped between 609 and 055 MAFs and an Evo III Ecu with same results.
Thoughts?
Sure i can, and i will be putting a boost controller on it and making the standard BCS redundant, but its bugging the shit out of me not be able to track down the problem. Plus, something else may be reliant on said source, and i just haven't come across it yet.
The Evo II 63t has been running in the Satria since November and whilst run in, boost has been controlled straight off the wastegate. The car is using all standard E2 ECU, intercooler and piping, standard intake/airbox etc.
Yesterday i hooked up the stock boost control solenoid and relevent vacuum lines hoping to run the standard 12-13psi.
There's one line off the nipple on the cooler piping, to the top port on the solenoid, then from the bottom port it goes to the wastegate.
Took the car for a spin, and it freeboosted past 1.2bar and i backed off. Drove it back into the garage and started troubleshooting.
First was to make sure all vacuum lines were still attached and plumbed correctly. Check.
Next i removed the solenoid from the car and tested it. I tested it by putting 12v across the terminals and blowing air through it. Remove the 12v and air couldn't be blown through it, hence solenoid was opening and closing as it should.
I started to think why the solenoid wasn't opening and thats when i realised the ECU should have stepped in at roughly 15psi and delivered boost cut.
So it looks like the ECU isn't completely reading the air going into the motor as theres no solenoid trigger and no boost cut. But where does the ECU get its source?
I've spoken to a couple of trusted guys about it, with both mentioning the ECU gets its signal from the volume of air measured through the MAF. This makes complete sense, though i'm still not convinced this is the only source for the ECU as the AFR's appear to be all normal.
In my travels, upon removal of the turbo intake piping (MAF-turbo) i noticed theres a small hole just below the j-pipe. Its definately supposed to be there, and looks like factory intended. With nothing in it, its obviously sucking in unmetered air, so what goes in here?
I've swapped between 609 and 055 MAFs and an Evo III Ecu with same results.
Thoughts?
Sure i can, and i will be putting a boost controller on it and making the standard BCS redundant, but its bugging the shit out of me not be able to track down the problem. Plus, something else may be reliant on said source, and i just haven't come across it yet.
