Compressor Surge or Faulty Wastegate actuator?

[Dougal]

Hi All,

Needing some help please.

I have just had my 2nd engineering brake test today and its fail.

Nothing to with the brakes on the car the car just could not perform well enough to actually do all the brake tests.

Basically the car is hooting, jerking and what sounds to me like surging upon boost.
Car will not accelerate normally when driving but not all the time sometimes its fine.

Free reving the motor out of gear and stationary is fine and i can push the car up to 5000-6000rpm no problem.

It only happens when its actual load driving and its intermittent.
During the test today there were times I could get the car upto speed quick rowing the gears and all was normal then there were times it would buck and jerk and hoot.

Knock of 9 counts normally resulted from this. I data logged this thoughout the brake test.
Once the car started knocking the only way to stop it was to turn the car off and wait for the ecu to click off.

Datalogs showing the fuel pump is switching off intermittently? Should that happen?

Here are details of the setup. Its a 3s 6g72 motor in another mitsubishi (be open minded please)

Chrome ECU v2
Stock 9b turbos
3SX hard intake pipes
tactrix 3 port boost solenoid
EVO BOV metal one (evo 8/9 one i think?)
K&N oval pod filter
Montero MAF (scaled in Chrome)
NGK copper plugs (heat range 6)
Stock injectors
Walbro 255 pump


Some of the troubleshooting that was done by the engineer and myself was to bypass the tactrix 3 port and just feed directly to the wastegate (wastegate spring pressure only)
We also bypassed the EVO Bypass valve.

Here is a video of the car. Early part of the video you can here the hooting sound.

https://youtu.be/X8dA54qTKCI

Also attached is a datalog of the car. Yes the AFR is quite rich.

Thanks guys