hi i have a problem maybe u can help, i have a 95 supra i just finish my swap (2jz-gte) but its not running good dryving normal it shift good and down shift but if u driving at 40 or 50 mph and u push it i will not down shift but it u do it manual it will and i put a walbro 255 pump and 3 inch intercooler pipe so with that it should run good but i think it has no fuel because u push it and it backs fire bad and it does not go smoff (good) timing its perfect compresion is a 170- 175 all piston please let me know what u think thanks.