(T) Power loss and intermittent fuel injector warning light problem. HELP!

Hi

Before I start, I should say that I know very little about what goes on under a car's bonnet! Any help you may be able to offer needs to be in an 'idiot's guide' format! Thank you.

My 1.4 ie Tipo has developed a power loss problem. It usually happens at fairly low speeds (0-35MPH) and is intermittant, but seems to be happening more often.
When I accelerate, the power suddenly dies and the car sounds like it is spluttering and struggling, before gradually returning to normal. The power loss lasts for only a few seconds at a time.
I'm not sure if it's related although I suspect it is, the fuel injector warning light comes on intermittently. The light does come on when I am having power loss issues, but it also comes on at other times. Unlike the power loss problem, the warning light seems to come at any speed too.

I have already had a couple of suggestions regarding the cause of this, after talking to a chap at my local Fiat dealer, as well as a friend who has a little more knowledge than me about cars.

The Fiat dealer suggested that I check at the back of the inlet manifold. He said that there are 2 30mm bolts where the earth leads go in. He said that these often come loose/get broken and that this could be the problem.

My friend said that it sounded like it could be a spark plug firing intermittently or one of the wires leading from the spark plugs? (I think I've got that right). He's going to come out with me for a drive later so he can listen to it and feel exactly what is happening, so I may have more information later today to post.

Any suggestions or comments you may have would be appreciated!

Thank you

broken down HT leads (from the spark plugs to the coil) could cause it, as could a poor earth strap. There are more issues like throttle potentiometers but that usually affects depending on how hard you have the throttle pushed - regardless of speed.