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The mkiv Supra Owners Club

boost solenoid normal operation?


Crouch
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I have a quick question for those in the know about a potential problem with my car.

 

How does the greddy boost solenoid work does it control the boost by opening and closing really fast or like the old school Bren/bleed valve just restrict the signal to the wastegate?

 

The problem:

When i give it some large (low/high boost no change) sometimes when i back off there's a noise like ABS pump grinding but a little slower but as the solenoids bolted to the inner wing it sounds like some one with a hammer action drill on the wing!..it's really loud! it stop's when say i switch from high boost to low on the toggle switch, back to high and the noise starts again!..rev the engine and it'll stop altogether untill i get on it again and it'll start again. This doesn't happen every time but maybe 75% of the time.

 

Is this normal because i'm really getting frustrated by the "nice car but what the hell is that noise?" comments.:(

 

Any help/advice welcome

 

Gary Crouch

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