I can't find info on this problem: 3 1/4 year old TB 302 EFI with 105 hours on the clock. In the last month or so when starting from cold, engine goes to high speed for just 3 seconds then right to idle (when new it would go to high speed for about 15 or 20 seconds before settling down to idle the way it's supposed to). Otherwise unit works perfectly, goes to high speed then back down to idle 15 /20 seconds after welding/or electrical load is terminated. Problem at start-up only. Any ideas?? Miller factory tech helpful but unit just out of warranty. Thanks for any insight on this.
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