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The mkiv Supra Owners Club

Boost going bananas


Guest Dante

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Guest Dante

Hia! :D

 

Got a strange boost problem. When i floor the pedal on 3,4 or 5th gear and just when the second Turbo comes online i first get the regular boost drop and just before it reaches max load (0,8bar) the boost jumps up and down between 0,6-0,8 for a short while (2-3 seconds) and after that it stays still at 0,8 untill redline. Any ideas? :S

 

My plugs are BCP7ES gapped to 0,9mm (new from couple days ago). Car is a Jap-spec, dynoes to 315Hk and boost is about 0,8.

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...the regular boost drop and just before it reaches max load (0,8bar) the boost jumps up and down between 0,6-0,8 for a short while (2-3 seconds) and after that it stays still at 0,8 untill redline. ...

What exactly is the regular boost drop?

On a stock setup there is no such thing.

 

As said, I'd first try replacing the vacuum hoses all around the actuators and VSVs.

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Guest Dante
What exactly is the regular boost drop?

On a stock setup there is no such thing.

 

As said, I'd first try replacing the vacuum hoses all around the actuators and VSVs.

 

Uhm well not boost drop, i meant the tiiiiny delay before the 2nd Turbo kicks in bascially. :) And Edge, they look okay but i'll take them off and have a closer look then, thnx for the tip.

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