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Old 07-04-2020, 05:39 PM   #9
Gutterboy
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Join Date: Apr 2015
Drives: 2013 frs; 1988 porsche 944s - > 948
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Quote:
Originally Posted by Gutterboy View Post

Gonna do some logs of my MAP voltage at idle vs wide open throttle....
Did this and oft reveals map showing random jumps from 5 to 6 psi at idle to 37 which then ignition advance steps in to correct and bogs idle down to stall.

Only thing I don't understand is how manifold absolute pressure shows positive 5 psi or so at idle while boost from ecu is showing negative pressure for vaccum which is what one would expect and coincides with what my scg-1 boost controller reads and is calibrated for altitude at.

Can't explain that.
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