Hi I am having intermittent ignition problem with a 1989 3.5 Efi V8. On starting - whether warm or cold - the engine spounds OK but, as soon as you put any load on it the engine becomes lumpy - sounds and feels similar to when you wrongly connect two of the ignition leads. However the lumpiness usually dissapears after a short bit of driving. I have replaced coil, HT leads, ignition amplifier and dizzy cap to no avail. I have a new condensor on way.
Anybody else got any ideas???
Graeme