Background: Field Motorsport 2.1ZVH, aftermarket boost control (apexi avc-r), external Tial wastegate with 14psi spring.

Now I had a problem with the engine going spastic when you give it any accelerator or even very light throttle. Field Motorsport said somehow the wires on the ECU end got mixed up and triggered the ALS. All sorted... or so I thought.

Now there is no boost, nothing. Might reach 0psi when rev'd hard otherwise its vacuum all the way.

Changed: MAP, Phase (Zetec CPS due to the coilpack), plugs, leads, injectors and even a new turbo!

Any ideas before it get trailered to Field Motorsport?