VS V6 Excesive fuel usage and strange misfires when moving slowely forward in gear.

[hsv91ss]

I don't know how to really put it, but lately my Car has been using more fuel then a V8. When ever you pull up to a stop you can smell that egg type smell from the rear of the car.

Also a few times now in traffic when you moving slowly there are a serious of small miss fires the engine idles weird you you can feel and hear it through the exhaust, but when you come to a complete stop or idling in the driveway it idles fine.

Sprak plugs were replaced a few Months ago so I doubt it is that.

[rk has a vn]

Leads might be ####ed

[Not_An_Abba_Fan]

The first thing to do would be an error code check and see what it comes up with. After doing it once, clear the codes, take it for a drive and check it again. This will get rid of any old codes and only set any new ones if they exist.

[EDGE3]

Check the coils,leads and the spark plugs as they can break down even when they are nearly new I can vouch for this.