R50/R53 :: Hatch Talk (2002-2006) Cooper (R50) and Cooper S (R53) hatchback discussion.

R50/53 Does this weird boost profile mean I have a bad MAP sensor?

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Old Nov 21, 2025 | 11:52 AM
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E_V_A_N's Avatar
E_V_A_N
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1st Gear
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From: Sylva, NC
Does this weird boost profile mean I have a bad MAP sensor?

Hi all,
I have a 19% pulley but have noticed weird boost issues.
While I don't have logs, I have Torque screenshots that may help.
You can see the boost builds, then is pulled back, and then finally spikes again around 6k RPMs (I let off at 6k since I have a 19% pulley).
I replaced my BPV but no success.
Thanks for your help!

 
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