he has only drivin it 30-40 miles??????? previous owner ran RACE gas in it???????? now high altitude????????

Race gas and street gas are terribly different-------he needs to completely drain the system and then put gas from a trade mark name company back in it-------and always fill up at the same place-----------the differance of street and race gas is so different that its qqqqqqqqqqqqqqqqqqq!!!!!!!!!!!!!!!!!!!!!!