Car stalling while driving with new turbo

[miskyline94]

Car stalling while driving with new turbo

hi all, 

i just replaced my turbo on my gtt from factory turbo to Garrett gt 30/76 internals on my factory housing. 

when i drive at a rpm over 3k and put it in neutral the revs will go all the way down till the engine stops.

does anyone have any idea why this could be ? 

thank you  

[hardsteppa]

Either something not connected/air leak or something not plugged in/electrical.

[miskyline94]

ok thank you cuz the car also over boosts but i assume thats just the factory computer @hardsteppa

[Dose Pipe Sutututu]

take a photo of your turbo setup, and focus on the intake pipe @miskyline94

[miskyline94]

@Dose Pipe Sutututu

[miskyline94]

@Dose Pipe Sutututu

[Dose Pipe Sutututu]

factory pipe work.. could be leak somewhere..

Are you running any wanky BOV? or is everything stock except the turbo?

Also it might be overboosting because the turbo has a larger actuator on it.. not ECU related.

[miskyline94]

It's a factory bov but it is blocked of to re-curc and I have a front mount intercooler other than that its stock

[admS15]

unblock bov and see if problem goes away.

[Dose Pipe Sutututu]

2 hours ago, miskyline94 said:

It's a factory bov but it is blocked of to re-curc and I have a front mount intercooler other than that its stock

there's your problem

[miskyline94]

Why would the bov have anything with the engine stalling when I come off boost cuz the pressure is just going back though the turbo ?

[miskyline94]

@Dose Pipe Sutututu @admS15

[admS15]

The pressure is also going through the air flow meter backwards. The ecu sees this as additional air flow and injects more fuel. On some cars with air flow meters this causes stalling problems on others just rich running, unless the ecu has been tuned for it. Try unblocking and see what happens. Im sure dosepipe will correct me if im wrong

[miskyline94]

ok thank you @admS15 i will give it a go today. 

really appreciate the help and i am no expert. 

will let you know how it goes  

[miskyline94]

Also i might add, 

the reason i changed the turbo is because the factory one shit itself but when it went out there was a bit of oil around the intake hoses, so i was wondering if some of that oil would have gotten on the AFM. 

should i remove it and clean it with contact cleaner? @admS15 @Dose Pipe Sutututu

[niZmO_Man]

Cool, plumb the BOV back as per factory and see how you go.

[miskyline94]

will do, 

but also for my peace of mind, would it have anything to do with the factory ECU? @niZmO_Man

[GTSBoy]

Well, the factory ECU will certainly not be happy about the much larger quantities of air that will flow.  You MUST get an ECU or at th every least a Nistune board into this car.

[Dose Pipe Sutututu]

adms15 always on point

[miskyline94]

ok so i there is nothing the bov is doing to the stalling, 

but we did rasie the idle a tad so the car has stopped stalling and also must of fixed the over boosting problem. 

a new ECU is defs on my list but money wise it is not going to happen very soon. 

and whats a nistune board? easy install and pricey? @GTSBoy