If it's off one tooth (cam gear), you won't be able to turn the engine by hand - a piston will hit a valve. I had a one tooth jump the first time I changed a timing chain - there was no doubt. Backed it up one tooth, and the engine ran as sweet as could be.
Ah, but which way did yours jump? I can't explain it, but this one reads at more than 20 degrees ATDC, and runs. All the way to redline though with no power. I'm thinking I'm going to have to rig the dial indicator and go back to basic principles to make sure the timing scale is right, etc. -- Jim
