If your car is a late Hot-Wire, it still has a distributor, and replacing all the plug-leads, then the rotor arm and distributor cap, and then the ignition amplifier (small black box) and then the coil might be the route to tracking the problem. All are pretty routine and inexpensive service parts. Do check all connections are sound as you do so.
If the car has the later Gems injection system, then after plug-leads, you are only left with the coil pack to check/replace at the rear of the engine.
All this assumes that it is ignition, not fuel, that is at the root of your symptoms.
Do let us know how you get on.
Andrew Green
Glorious Devon
2002 Plus 8
