i have a t78 put into my car drove fine for 1500 km but now when it goes over 0 bar of boost it sputters and wants to die but it runs smooth under that... ne one know what could be wrong? oh and b4 i was running .9 bar of boost

 

Any other information.....boost gauge , ECU, UK mods, because to me it sounds like your not making any boost, perhaps you'd like to try the single turbo forum.

 

Modifacations: Aftermarket Greddy t78 Single-Turbo Kit including Stainless-steel Exhaust Manifold & External Wastegate, Front-mount Intercooler kit, HKS Hypermax Fully Adjustable Suspension, ALCON (GREX) Front Caliper & Rotor Brake-kit. A/M Engine Pulleys, A/M Fuel-pressure Regulator, A/M Stainless-steel Turbo-back Exhaust(just bought fujitsubo exhaust from allen), Greddy B.O.V., HKS Air Filter. HKS EVC Boost Controller, HKS Turbo Timer, Greddy Gauges: Boost (X2), Oil Temp, Oil Pressure, Exhaust Temp, Battery Re-located in rear.

 

it wants to boost.. it trys ne ways...

 

Sounds like a massive vaccum leak under boost. check your couplers for your FMIC piping. My TII was doing the same thing until I checked and tightened down all my t-bolt clamps. Fixed the problem right up.

 

check map sensor hose.

 

So where does it fall off at 5psi, 8psi ? ? ? ?

 

it doesnt hit any psi..as soon as it hit 0 it sputters and shoots flames