Sorry for my first post being one asking questions but I'm struggling to solve this one.

The fault is with my mums car, it has been into the garage who have read the fault codes and found nothing. The car is a P reg (1997) 1.8 Carisma. It has been a great car for the last 6 years, and always reliable until this.

Intermittantly the engine managment light will come on and it will be severely down on power, missfiring and refusing to rev. The fault goes away when the plug leads are disconnected and refitted!

The garage has tried replacing the crank sensor with no change but TBH I don't have much faith in them anyway.

They are now suggesting that it may be a coil fault, but a new one is £155 so I wanted to be sure before we go and purchace one.

Has anyone had a similar problem or have any ideas?