Tried to search under boost but never came up with what I was looking for. I took it to the shop today, my car stalled when coming to a stop. Got it back, they said a vacuum line or something was loose off the y-pipe, and they tightened back up. Now the car does not stall at all, but I have zero boost, it will go back tomorrow, just seeing if I could fix it back as it is kind of a long haul to the shop.

 

can you give more specific description as to your spec and how it's not boosting?

Do you still have sequential turbo set-up?
Does your car boost in the primary turbo area and trop after about 4500rpm?
Does your car not boost at all through out?

 

^and does your gage registar vac?

 

No boost at all, it was fine before, car is bone stock except for downpipe plus catback. Do not have a vac gauge.

 

check if the coupling hasn't come off the y-pipe. Happened to me, when I started boosting the pressure pushed the pipe to the ic off of the y-pipe.

 

i wonder if the boost gauge is disconnected...

 

no, you can feel their is no boost at all, kind of feels like my buddys na mk4 supra it so damn slow

 

ok you said zero boost. Does it feel like the car is restricting the boost when it's supposed to be boosting? Does rpm go up smoothly? If rpm doesn't go up smoothly with full-throttle, does it go up when you gas it gently trying not to boost? If so it's a fail-safe. When some important solenoids (turbo-control, chargecontrol) fails or important sensors aren't working properly, CPU will go into fail-safe mode. Best thing to find out is to do the monitor check and it tells you which sensor or solenoid is bad. If it doesn't show anything then you can start looking into mechanical things such as phisical vacuum hoses, intercooler pipings, all the valves that controlls sequenstial turbo system. but before anything, MONITOR CHECK!!

Good luckkkk

yuke
日本車世界一！
がんばって直してくれやーー

 

First off, get a boost gauge. It's really hard to determine what is wrong unless you have some sort of boost pattern. If it doesn't boost at all, then you have a major boost leak somewhere. If that is the case, check all the pressurized hoses. Come back once you have some way to measure how much boost you're making.

 

Problem fixed, the ic coupling came off. Perfect boost now, but when I come to a stop with my a/c on my hood shakes violently but WONT stall, before it did stalled, but my mechanic said that he fixed it from stalling by fixing a loose vacuum hose on the y-pipe.