I hear you, my oven isn't big enough either. I haven't done any of the ceramics just powder coating. Hope to be done with mowing after this year my zero turn has 2000hrs on it . Decks and off road parts are my goal to replace the lawn care for side entertainment.. LOL
Try jiggling the connections at both ends while it's idling see if cuts out. I had a bad from another vendor wasn't crimped on one end gave me fits for a long time till I found it.
It will reset with key cycle. If your pulling a load you will notice the defuel more. Either you have to , back off the boost, build the boost fooler, or tune it.