Yea, I'm having the same problem, I've done plugs, leads, rotor, distributor cap, air filter, fuel filter, oil chinge, oil filter, cleaned out my air intake, and put some injector cleaner additive in but still no avail..
If it helps I notice it runs ok after 70kph and reverses fine, it's just as soon as it goes into first all hell breaks loose. Also I can hear a loud spark coming from somewhere to the right (looking from hood to trunk) of the engine bay while it's sputtering.
I'm thinking it may be the coil??