I'm a new to Z mechanics, hope some one will help. I recently degreased the engine of a 78 280ZX. Everything seemed to run fine after rinsing the cleaner off the motor and drying vital electronics. I replaced a few vacuum lines and put in a new Accel coil. Now when I run the engine to near WOT, it smothers out at 2,300 rmp. Anything below that and its fine. So I put the OEM coil back on, same problem. Anbody have any ideas what to check??