Stray vacuum line

[Michael Sylvester]

The spring alone will allow only 1.4bar.
To get greater than 1.4bar the ECU needs to pulse the WGFV.
If the spring were set to allow 1.8 bar of boost, you would certainly destroy the engine in short order.

Mike Sylvester

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Thanks for the response, the end of the hose is cracked, so it makes
sense that the heat caused it to deteriorate and fall off the bypass
valve.Though, if the wastegate frequency valve is bypassed, shouldn't
the wastegate only open when the boost equals whatever the internal
spring is set to (which I assume is 1.8 bar?)