Originally Posted by
BenFenner Or both cams moved equally and no cam teeth were skipped, but the crank sprocket skipped a tooth. This would cause ignition timing to be off by 20 degrees as Cliff said. The direction the crank rotated when the tooth skipped could be either way, so it could cause the distributor to need turning either way to "fix" the problem.
Originally Posted by
Cliff It's very difficult to skip a tooth on the crank. VERY difficult.
Also, note that the cam profiles are different as well, which may be confusing you, Ben.
If the engine has a skipped tooth on the crank and 'correct' it by advancing the timing, does that cause any other issues or just that your distributor is in an odd placement? In other words, is there any negatives to a skipped crank tooth?
I've always had a similar problem ever since I've purchased my engine. Cam timing is 100% correct(checked more than 3 times), but I have to advance my timing almost all the way advanced to get 15*.
-G