acetomatoco

You have a drainback situation and some air gets in your injector lines and you get rid of it by increasing the fuel flow by throttling up... Some day when you have nothing else to do, shut the engine off warm and watch the transparent lines for a couple of hours and you may see some little bubbles forming in one or more return lines...there lies your leak...been there...even saw one doing it at the Portland CT show 3 years ago.....