how to test a coil pack on a corsa c?

basically timing chain snapped (43000 miles fsh,not happy)bent 2 exhaust valves on No4 cyl,tore it all down,replaced valves,Hg,new chain etc.Definately no spark on 3 & 4,engine running happily on 1 & 2 & can see exhaust camshaft turning so guessing camshafts ok.also I figure if I cocked up valve timing it would be out on all 4 cyls so why 1 & 2 operating normally.lastly fault code are only 0300,0303 & 0304,not much help

garyv8
April 2010

you say you replaced cam chain i take it was running ok before you did chain other than rattling ,have you set the timing correctley also the cam phaseing disc on the inlet cam set correctley also is there any dtc,s to go on may be able to help further

scott
April 2010

Are you sure there is no spark? The exhaust camshafts have a habit of breaking on these engines.

ChicksFan
April 2010