Hi guys, I have a 1991 accord ex and I have been trying to find the engine code on there and usually it is on the side of the intake or head, somewhere in there but I can't find it anywhere on there. Please lemme know if there is somewhere else I can look. I do know that it is a f22 either A1, A4, or A6. Is there any difference between the 3? I saw you guy's chart and they about the same. Any help would be appreciated, thanks.