i need help

[eg.bubble]

i got a eg bubble with full gsr swap when i give it gas sometimes it dies out but as soon as i let go of gas it stays on and some times it hit like 2 step but it stock and then sometimes it runs fine any advice

[Epics Coupe]

Bad ecu try a nother one i have that problam when i use my chiped p75 but when i use my pr4 it runs fine