Hi techheads. Boost in my car has suddenly started maxing out at around 5psi. Simply no more boost can be produced for some reason.

Things we have checked.

1. Wastegate is closed (no scream can be heard) and not leaking air. Even tried disconnected boost controller and setting the wastegate to closed manually.
2. Car idles fine and low speed driving is almost as good as normal.
3. All hoses in the engine bay are connected.
4. All intercooler pipes are on and connected and no hissing sounds can be heard at idle.

Symptoms:
1. Car builds boost really slowly and peaks at around 4-5psi max even when revving to 7000.
2. Car revs smoothly but simply has no boost at all.
3. At very low revs when doing <30kph or just cruising along car feels fine but lacks grunt as soon as u try to give it some throttle. over 3000.

I think that the turbo might have spat the blades out the exhaust and now cannot build boost because it has only a few blades left??? Is there anything else that might cause the car to behave fairly normal when cruising and then struggle to make boost up top???

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WTF? Link IS a proper ECU

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PerthWRX - Where gay singles meet!

you have an air leak somewhere or a hole in your intercooler

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Long live the WRC

Boost leak or the BOV?

so dont say it ?

simon, checked the internal gate? could the weld have broken and its been jammed open ?

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MY93 Impreza GX 1.8L, 0hp, 0nm

Ummm the internal gate was welded in a full circle from end to end right around.. I doubt thats broken off.....

Car is getting checked on monday but I wanted to see if anyone had any suggestions of things that might cause this sort of problem that I had not thought of.

Will have a look at the intercooler tonight. Any good ways to check for leaks Tuna?

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Get it on boost with your head under the bonnet, listen for a PSHHHHH

besides filling stuff with water and looking for puddles... not really, just slow inspection of every joiner and flange

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Long live the WRC

Simon, whilst you have this boost problem....get onto the fwy and do 100km/h.

Let us know what the RPM is.

Thanks

reckon u can slip a clutch that much when its not boosting, report back with results.

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Wand basics:
One must brake with the left hand and steer with the right foot.
Having Defi's does not make Racecar..