Hello!! I have a 97 626 4 cylinder, automatic trans. There are no codes in the computer and the check engine light is not on. When I try to accelerate from a stop, I get a pretty bad dead spot, or hesitation. The car runs perfectly, otherwise...Anyone heard of this or any fixes?? I replaced the plugs, wires, fuel, and air filters. I am almost at my wits end.. Thanks for your responses!!

try cleaning the fuel injectors(or replace them)and do the same for the fuel pump.

go to
www.mazda626.net
and do a search for your problem or join the board and ask the same question they are very good and it is dedicated to 626's.