Don't know if this is in the right section but here it goes, Had an issue when driving the starlet down the road to test my jam ecu , turns over first time give it a good 15-20 mins to settle in and warm up. Took it down the road and it started boosting correctly so I thought GREAT! Tried giving it a bit of stick in third and it boosted properly but at 4k revs decided to misfire and bog down! I'm talking the loudest bangs I've heard from a car . I do have a slight boost leak maybe this is the problem? Spoke to Keith at zisco who was very helpful and told me to check timing and fix the boost leak , just wondering if anyone els has had this issue and what they did to fix it ? Cheers