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I can't say much more than that. Some engines were set ( = mapped ) for a cas set at 10° BTDC, and that base value is set at 10° in the ECU. Most of them were set for a cas at 15° though.
But one thing i know for sure, if the cas is not somewhere around its middle setting, cam timing is out.
Also, how did they check timing ? Because the only correct way is to use an HT lead between the first coil and the spark plug, and take it from that HT lead. Any other place, like the test loop, usually leads to wrong results on that engine (the ca18det has the same problem).
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