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MAP jumping up and down - help needed

   
Old 03-27-2016, 03:09 AM
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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, 11:48 AM
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Where is your map line attached?
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Old 03-28-2016, 06:36 AM
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Intake manifold after the TB
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Old 03-28-2016, 11:04 AM
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Originally Posted by elior77
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, 02:39 PM
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Could be caused by closed loop boost control.
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Old 03-30-2016, 02:49 PM
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Originally Posted by stefanst
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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