turbo stall? help needed.

[Edge]

On hard accelleration ussually after going over a speed hump.

At 5000rpm hear a sound from the engine a bit like what you'd expect from a noisy error buzzer and the rpm gets stuck at 5000 rpm for a couple of seconds and no acceleration of car.

.

Has anyone experienced this and what do I need to do to fix it?

[memphis]

auto or manual?

[Edge]

auto

[memphis]

its not the auto gearbox getting stuck between a shift is it?

auto gearbox normally shifts around 5k rpm, it could be that its having trouble moving up to next gear, so it takes a small amount of time to move up.

Could be an electrics problem (altenator, battery or ecu) or perhaps the gearbox is on its way out?

Used to happen occasionally in the supra, gear shifts would take a few seconds, and during these few seconds the car would keep revving (car would lose acceleration too)

[Edge]

not a whole 2 seconds though does it?

and the rpm gets stuck at 5000rpm while its changing gears?

I guess its possible - perhaps I should change my gear oil first.

[Edge]

finally this is under hard acceleration and I've never noticed the car changing gears at 5000rpm when under hard acceleration .

It always changes at 7000 rpm.

[Edge]

car sounds more like its grinding ERRRRRRRRRRR

completely different engine/exhaust note! Like I said before - an alarming ERROR BUZZER just slightly louder than normal when under full boost. It kind of reminds me of a sound like air trying to be blown so super hard/fast through a horn so that the noise goes away! blabblabblab at extremely high frequency.

This does not happen on a smooth road. Only when accelerating HARD just after the front wheels go up onto a big speed hump, going over speed humps which jolt the car.

[Edge]

Could an o2 sensor bo at fault? Mine is jammed right up against the turbo heatshield.

[memphis]

Beyond me, sorry, im a simple man

it does sound like a gearbox issue though, do you still shift thru gears with your auto as if it is manual? (ie shift to '2' when approaching lights)

Maybe get a mechanic just to have a quick check over the car, just make sure nothing is loose?

[Edge]

no fully auto in power mode.

I'm starting to think that the speed hump may be causing the gear to change early.

Also I feel that it may be compressor surge on the turbo.

What I would like to find out is - if the exhaust pipe is not firmly mounted could it cause this sort of problem? My exhaust pipe could be bumping around a bit. Its 3" inc dump.

Also could brake issues such as air in lines or uneven disks cause this? I have ABS.

[Edge]

other known issue that it might be is

broken bolt - told it was on the side of the turbo with the exhaust pipe on it, - ie. not under compression.

Could this leaking cause this?