Hello,

Under WOT, in 1st gear, boost peaks at 1.4 bar like normal, then at about 5500 rpm, I get this loud hissing/high pitched spool sound and boost drops well below 1.0 bar. This sound continues as I shift through the gears at WOT while in the upper RPM range - and boost never peaks back at 1.4 bar. I've checked all piping connections and vacuum lines and they all seem to check out fine. Engine mods are the following:

- RMR cat-back
- K&N drop-in
- Dejon mbc
- Jestr M1 flash
- Helix downpipe
- 3" test pipe

Any help or feedback is appreciated.

Thank you.

 

Get 2 clips from your trunk lining and use them to fasten down the intake snorkel.

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Bat-talon

My crew of saved Gotham City Residents:
someone help please
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Thanks Batman!