A distributor will do the exact same thing if timing to the cams/crank is off...swapping from a CPS will not help. Do this:
- Confirm the #1 piston is at TDC by inserting a small diameter wooden dowel or chopstick in the spark plug hole. Rotate the crank damper until the dowel peaks out at max height.
- The crank damper index should point at zero when the dowel is maxed out.
- Both cam gears should be pointing at the index marks on the back plate when all of the above is true.
- The CPS should be installed and look like this with everything lined up: