hey guys we changed my spark plugs yesterday, and when the car is in idle its really lumpy and does not feel good
anyone know why this is and how i can fix it??

cheers guys
james

Assuming you did it yourself, have you checked the gap of the new ones are the same with the ones you replaced? Sorry, I don't know what it should be, but should be marked on the side of the old plugs. check this matches the new.

If ok, check the leads are connected properly @ both ends. The leads could be damaged internally midway, in which case I'll disconnect and reconnect them them out one by one listening for idle change, the one that doesn't cause a change is probably the defective lead.

Good luck.

inside my bonnet it says the gap should be 1.0-1.1mm and that looks about right, i didnt check them with the old ones coz ive thrown them away, but last time we changed the plugs it was fine.

ill check the leads but it wasnt doing it before we changed them so i dunno

Are you sure you put the leads back in the right order?

:bump: please help, cars still idling like its got big lumpy cams