"I'm about 205/210. Will weight affect this?"
Yeah, weight is a factor.
With a really light-weight fork, like the 4ZA, a guy your weight can flex it pretty easily during braking. When you combine this with a flimsy,floppy brake like the Avid, you get problems.
The problem with the Avid brake is that it simply isn't very rigid. All those fitments and parts combined with poor manufacturing tolerances result in a product that wiggles when you use it. That wiggle turns in to brake shimmy, which starts the fork oscillating, and suddenly you have a really bad brake-pulse.
After all this talk of brakes, you may actually be pushing the realistic weight limit for a fork as light as the one you have; that is a very light fork, and over 2 bills, you can probably flex it enough to cause braking problems.
You definitely need to throw the Avids away - no question. But, if after you do this, you still have problems, a guy your weight may want to invest in a more heavy-duty fork.
For your particular application, If you have to get a carbon fork, look at the wound-up or Empella forks; these are a little beefier than most of the carbon products out there, which are really designed for light-weight racing. With that said, I would actually recommend a good steel fork, like the Steelman, Kelly, or maybe IRD; the extra mass, as compared to the carbon offerings, will probably help you.
.
Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
Coaching and bike fit -
http://source-e.net/ Cyclocross blog -
https://crosssports.net/ BJJ instruction -
https://ballardbjj.com/