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Old 03-27-2016, 04:09 AM   #1
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Default MAP jumping up and down - help needed

Hey,

Got some none stable map - where to look first ? BOV ? vacuum leak ?



The peaks are 185kpa~ the lows 177kpa~

95 turbo miata
T28
DIYPNP
460cc
GReddy Profec EBC set at 12psi~(180kpa)

Thanks !
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Old 03-27-2016, 12:48 PM   #2
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Where is your map line attached?
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Old 03-28-2016, 07:36 AM   #3
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Intake manifold after the TB
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Old 03-28-2016, 12:04 PM   #4
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Quote:
Originally Posted by elior77 View Post
Intake manifold after the TB
I hear there's turbulence there so teeing off the fuel pressure regulator is better.
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Old 03-30-2016, 03:39 PM   #5
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Could be caused by closed loop boost control.
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Old 03-30-2016, 03:49 PM   #6
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Quote:
Originally Posted by stefanst View Post
Could be caused by closed loop boost control.
This is my vote. The "noise" is only in boost. Noisy MAP signals are always noisy.
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