This is a 5.3 with a asa 525 cam. the issue is a constant lean condition under a wot snap from idle. I have added up to 30% more fuel in the v.e. table and it has had no effect. this a s.d.tune. if you take off easy and have the rpm's around 2500 then go wot it will perform great. spraying it with carb spray during the hesitation will make it run correctly. fuel pressure is 58psi during lean condition. any thoughts??