After doing my valve job, my 1800ES ran perfectly (better than ever) for a week. Then, today, I couldn't get out of the driveway. Ran rough, and only after giving full throttle was I able to get back from the end of the driveway.

Here's what I checked:

1. Getting spark. Pulled plug wires, and saw spark.
2. Getting fuel. Checked fuel pressure with gauge at the cold start valve. About 28 psi, or as close as my cheap gauge would read. Had not adjusted it, so I don't suspect it.
3. Pulled off the injectors, and took out the trigger points. They sprayed alternately, just like supposed to. Injector seals looked OK.
4. Pulled plugs, they were wet and fouled. Unusual, as they had always burned perfectly, light tan.
5. Checked all electrical connections. No change. Nothing loose.
6. Checked compression. Identical 145-148 in all four cylinders.
7. Checked valve adjustment. Readjusted a few (minor adjustments, probably not necessary).
8. Turned over engine. All valves opening and closing.
9. Tried changing the timing, thinking that perhaps the distributor had somehow moved. No change, except that now I'm sure it's not in perfect timing.


Current symptoms: It will run, very roughly, as long as I have throttle wide open. Will not idle.

What I suspect: Given that everything else failed to make a difference, I wonder if the fiber timing gear skipped a tooth. It's not been replaced as far as I know

A. Can the fiber timing gear skip?
B. Would/could I still get perfect compression in all cylinders if off a tooth?
C. Would valve job somehow put stress on timing gear? Or just potentially a coincidence.
D. How to check the timing gears, besides pulling off the timing cover?

E. Other things I should check?