Thanks for the reply. Today my tuner logged for a good 90 mins or so with fresh flashes, idle, load etc. What he found was the cam would only go +/- 1 degree. At start it looked like -18 and it never went anywhere.
I have no CEL / MIL. DTC is clean.
We're debating replacing the cam actuators, as this has worked for a few folks. I don't personally have the equipment to log / check for cam settings in motion. Maybe I can try that this weekend.
Any additional data would greatly help. Replacing all 4 of the cam actuators will be a very costly endeavor....
Quote:
Originally Posted by steve99
Very few people if any outside subaru engineers, know the complete logic in the ecu software that determines if the cam vvt will become active.
Their is likely a sequence of events that must occurr for the cam timing to become active after an ecu flash or reset.
these likely include
coolant temp
oil temp
some timer that activates only after idle rpm falls below say 1000 rpm, for about a minute
Ignition advance multiplier must be greater than a threshold think its about 0.2 in stock rom this is switch between base safe and normal cam tables, another threshold about 0.7 for normal\safe.
Dyno may also upset cars stability\vsc system , two wheel dyno front wheels stationary so vsc\traction system likely gets upset and may signal ecu to keep in some form of low power mode.
even 4 wheel dyno may upset vsc if different loads applied to frtont back wheels.
perople often report that cam timing comes good once car off dyno and driven for short period.
so that may indicate it was traction\vsc related.
its all guessing rearly
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