16v slight misfire

1. jware92 Frequent Poster Joined: Feb 2009 Colwyn Bay/Southend Posts: 608 Mk2 vts VXR engined astra

   #1 26th February 2012, 20:22

   Got a vts with a slight missfire on the lower revs
   Would a pair of cat 705s have any effect on this?
   Seems to miss a bit between 2-3k then spring into life at 4k
   have changed lambda, map sensor, ngk plugs, temp sensor in the last few days with no change
   All the old spark plugs were a slight pinkish colour but none seemed a different colour to the rest
2. jware92 Frequent Poster Joined: Feb 2009 Colwyn Bay/Southend Posts: 608 Mk2 vts VXR engined astra

   #2 27th February 2012, 06:58

   Anyone?
3. CbVtR Regular Poster Joined: Apr 2009 Hemel Hempstead Posts: 437 Saxo VTR / Saxo VTS turbo

   #3 27th February 2012, 07:58

   Dodgy coil pack maybe? Does it happen all the time or is it an intermittent problem?
4. jware92 Frequent Poster Joined: Feb 2009 Colwyn Bay/Southend Posts: 608 Mk2 vts VXR engined astra

   #4 27th February 2012, 11:03

   Generally between 2-3k then at 4k it clears itself