6 months ago while driving up a large hill at 60mph with foot to floor the car started miss firing / hesitating, this was on a 998 standard engine. Stopped down the road and could notfind any fault wile idle or when reving all seemed ok, now drive off and feels a bit hesitant, go up a hil and it is realy noticable.
Thought what the heck I need a bigger engine anyway, so had a 1275 MG engine and gearbox fitted, only thing left over from the 998 engine was the alternator everything else was changed including carb, leads, plugs, coil, dissy etc ( all came withe the MG engine ). I thought this would fix te problem but no it is still there I then flushed the fuel lines and swapped the fuel pump just in case. Still did not fix the problem.
Next I thought it must be electrical so, as the alternator was the only thing left I unplugged the terminal block from the back of it, Hey presto problem has gone. Replaced the alternator and thought that would be it but no still hesitant under load, unplugged the alternator and problem fixed.
Can any one help, I was thinking of swapping the coil out next as it was not new when the engine was fitte, but what are the chances of the first coil and the seccond coil being faulty.
Over six months and £800 later and still not fixed
