Then you better keep your foot out of it until you have both installed. Dave gave you good advice. You may still have a bad coil pack and you should check it out. Without a boost gauge and a hot wire kit, you are going to be changing lots of head gaskets.
Inspect the hoses on the wastegate plumbing and be sure they are not cracked or leaking.
If the wastegate actuator rod is adjustable, lengthen it until it puts about a tenth of an inch tension on the wastegate puck arm.