Do this! take apart ur reg rebuild and replace orings, also make sure there are the proper number of shims and are stacked in the correct order...adjust the set screw for the reg so its all the way down. After that replace with a brand new battery....after that clean replace orings, and rebuild lpr. after that fill up ur tank. put everything back and ready with tank on....slowly over a chrono adjust reg to 280 or where ever...go slow adjusting dont do like whole turns at a time...should fix ur problem
Back in the day.....