I have exactly the same problem with my astra SRI 2.2. Between 1,000 - 2,000 rpm particularly when cold, has a misfire.
I have cleaned the fuel system and injectors, fitted new genuine spark plugs, replaced the O2 sensor which has helped, but the problem still remains.
Why would the coil pack give trouble only between 1,000 - 2,000 rpm? I am a little reluctant to replace it as everyone heads straight for the coil pack and there seems to be a flood of them on ebay because I don't think people really know, even dealers use trial and error with new components.
AZZ, please letme know if you have found the solution yet.
Tuesday, July 12th, 2011 AT 5:37 AM