Folvo,
I've made several threads about my mishap with my balancer. I thought it wasn't a common thing, so I never in a million years guessed that's what the problem was. The inertia ring slipped, so when it looked to be 10*, who knows what it actually was. Just put it this way. Even at 14* initial, the car wouldn't run. The idle was for crap. However, bump it up to say, 28* (even higher), the car ran like a champ, and never had a ping. The easiest thing to do is to take that balancer off, and compare it to a new one (or one you know isn't bad). Match up the key way, and if it slipped, you'll be able to see a BIG difference (mine was about 3-4 inches OFF). Let us know how it works out.
