A car has been sat for a while, but aparantly when started now, its very lumpy. The garage said it was the MAF, so that was replaced, but problem still persits.. The garage also mentioned that it was the leads ?? i pressume HT leads.. could that be the cause? what else could be wrong

 

How long is a while?
If its over 6 months the fuel can go off, this may cause your problem.
There could also be moisture in there, is the car garaged or kept outside?

Tony

 

no not 6 months.. not that long i dont think. No not garaged, its outside.

tbh all i know is that it was left for a certain period but not when he starts it, idle is very lumpy... Would it be worth leaving it running for a while..
Sorry for the vaugeness.