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Camshaft adjuster questions
Hi,
Car is a base 1999 Boxster.
At a recent autocross event I believe the bank 2 cam adjuster was stuck in the "on" position even at idle. After a run I had a rough idle and a P1524 code and some misfire codes. Car idled rough but was fine at higher RPM. It stayed like this for a few restarts and after a 1.5Hr cool down. Water temp was fine and no oil lights etc. Castrol 5W40 with 800 miles is in the engine.
When I went to leave it seemed to clear itself after the car was running for 2-3 minutes. It was fine the next day as well. No more codes. I have put about 60 miles on it since.
When I connect my Durametric to it I can reproduce the symptoms by activating the adjuster manually and it seems to go on and off properly.
What RPM the adjuster typically activate? Is it a multistage adjustment? Can I see this activate when driving with durametric?
Is there anything other than a failing adjuster/solenoid that can cause this? Low oil pressure? excessive heat?
Another data point is I can not seem to get an accurate Cam deviation reading. Bank 1 is 0.0 and bank 2 is 3.0. This never changes so I suspect it's not a real reading. This has been the case for several years and at least 7500 miles but the car has been running fine. My Autel MD802 shows no cam deviation data data at all.
Thanks
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