rough idle after changing coil leads

[Blueglow]

changed the coil leads on my Vy series 2 supercharged 6 Calais with top gun heavy duty leads and now the car is idling real rough, shaking etc.

wasn't doing this before. What is causing this?

 

[FATMOE]

Obviously the leads, check if they are all secured tightly or not in the wrong firing order.

Sent from my GT-I9505 using Tapatalk

 

[meady_183]

I'm with Moe incorrect firing order.

 

[Blueglow]

Yep. cylinder 2 and 4 were switched around. I've changed spark plugs and coil leads but it's still taking a few tries to get the engine going? what could it be

 

[Nut Kracker]

Try getting a better set of leads as in my opinion, Top Gun aren't really renowned for quality.

 

[NU13]

Try swapping one of your old leads that looks in top condition into and out of the cylinders until you have found a dodgy new lead IF you have a dodgy new lead in first place.