hi all just need some help so here gose when i start my saxo from cold it revs up the drops again its cut out twice after the revs have droped also when i pull of it splutters but i could answer this by say my lamber sensor is not plugged in as its got the wrong plug on the end. but i had a raceland manifold fitted a week a go but it was fine when it come out the garage i think its when iv took the standard air box of and put an air filter on that when i noticed the problem hhhmmm i dont know tbh can anyone help thanks 