Boost de-restiction pipes swapped back now only low boost?

Tomtheman2

Fresh Recruit
Hi, i swapped my pipes over to de-restrict 1st and 2nd gears, I used up a lot more fuel than normal obviously :p so I swapped them back and now I only have low boost!? I press the button for high boost and it is still on low, producing 0.5 bar.

What is going on?

Cheers,
 
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