Quote:
Originally Posted by wheelhaus
Are you seeing problems on the newer cars or is it still the older ones trickling in? I was under the impression it was largely resolved because the megathread and other similar threads seemed to die and became much less frequent Most owners were saying it had been fixed and hadn't come back, and those who did have recurring problems were treated with random replacement parts before the TSB, i.e. no ECU etc.
If this is still a current problem, do you have any insight to the root cause? Mine was first gen mfg'd in mid 2012 and my idle is rock solid after 13k miles and some track days...
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Most of them are the OCVs and there has never been a revision to them. I am replacing a cam actuator on one this week whenever the part comes in. Yes, both old and new models. One of the "fixes" was a revision on the tune to essentially allow for a larger margin of error for cam phasing faults but even with the newer ROMs it's still happening and its because the cams really are going way out of phase with one another. Whats causing the failure of these components (OCVs and Actuators)? I don't know. They briefly have blamed oil viscosity and replacement intervals but that's BS because the majority of failures have been good oil and the correct viscosity. The parts are all of course non-serviceable so tearing them apart basically ruins them. Electrically all the OCVs I have had issues with test good so not likely an issue there. It seems to also almost religiously be the exhaust cams suffering the most failures but no surprise as they are the ones working much harder than the intakes. The intakes are rather stagnant (meaning they don't really advance and retard as much).