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Old 01-22-2013, 08:52 AM   #18
Leafy
Scooby Specialist
 
Member#: 330625
Join Date: Aug 2012
Chapter/Region: NESIC
Location: MA
Vehicle:
2006 WRX
WRB

Default

The timing jumping up when the revs drop at idle is normal the car is trying to maintain the idle rpm. 105 compression is pretty low, but it was even so it could have just been the testing method (ie closed throttle plate instead of open) or the tester (really long hose, inaccurate gauge, etc). It might be an intermittent bad coil pack but this is so hard to diagnose without data from the ecu.
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