Just been out in the Nova GSi on my lunch break nipped to the garage and to Vauxhall ran fine no probs at all.
When i got back to my car park at work the idle was really low and felt like it was going to stall. Revved it sounds like its running on three.
Bearing in mind it was fine until i drove back into the car park im a bit stumpped.
The only thing(s) i can think off are the following
Plug and/or leads (although i cant see how this would just pop like that and the leads look ok from view)
Induction kit the old hot air problem (but why would it start doing that then when the car appears to be running at normal temprature anyway)