thuding knocking while stationary

[steak000]

hey my gf has a vs commodore and ive changed the leads and plugs but the car while in a stationary mode such as traffic light engine has like a thudding, like drumming viabration only thing left i can think of is coil pack???

[eurekamad94]

check that its a common problem

[Zuicider]

could be the other b/f in the boot

[vs2dy4]

had that problem twice. once it was the crank angle sensor, the other time it was the coil pack. check both out