I'm new here and new to Mazda but hoping someone can help. I bought a 2011 Mazda 3 2.0 5spd manual with blown engine (57K without an oil change or check)... Local shop had a Mazda 2.5 with 27K he sold me reasonably. Engine is in but wont fire. Shop advised me to have it towed to stealership and have the PCM flashed but I don't believe this will work my PCM is (i think) LFGT-18-881 2.0 manual with federal emissions and i believe what I need is L5E7-18-881 2.5 manual with federal emission... Flagship one does not have any L5E7, however they do have some 2.5 PCM from mazda 6 from the same model year. I also don't know the exact year of the the engine. Any help would be amazing! I'm afraid my $50 car is turning into a money pit.