We have a 96 Sunfire convertable with the 2.4 engine and a 5-speed transmission. The car has a bad hesitation problem when it's first started. It doesn't matter if it's hot or cold. Sometimes the engine will hesitate then stall, then it is very hard to restart. Once it clears up it runs great. I have replaced the fuel pump and filter, the spark plugs, ignition coils, the wires between the coils and the plugs and the air filter. We have been having this problem for six months now and it's very agrivating. Any suggestions will be appreciated, thank you.