loads of common faults on omegas, u really need to start fresh and get it checked on a code reader, best to use tech2 which vauxhall use, but u can pick up a diy code reader from argos, but this will only give u limited information, if u do go for the diy way, make a note of all the p codes and freeze frame data (freeze frame data is what the sensors were doing at the time of the fault) and then erase them, run it till the light comes on again or flashes and recheck for fresh codes, somthing like "p0340 camshaft signal" or "p0300 random misfire" "egr flow" is another, at least it will reduce the guess work, post what u find back on here for more help
garthy
February 2009
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