location of egr vaulve on vectra 2.0 sri (w reg)?

I have a 01 astra 16 16v,2yrs ago emg light on car runninig a little bumpy in 1st,2nd changed spark plugs,ran a little better, light still on,went on astra forum,somebody said egr valve and theres a main dealer reprogram of ecu (£40),to bypass this ExaustGasRecirculationValve,tried this
didnt work even maindealer workshop manager couldnt explain what reprogram did?? did try to give a £750 fault list with egr valve at £110 plugs £40,to mention a few went to a auto elec a knew ,his workmate chirped up,ive a 03 asrtra same prob a while ago recomend Valve Detox £10 at a motor factors 1/4 tank petrol chuck it in ,dual carriage way high revs, next full tank and a full bottle of detox,long run,(good job i was going to hereford from sunderland the following week) then i did another full tank &detox for return trip... Light went out and never faulted in 2yrs Priced egr valve at £40 andrew page motor factors,splugs £12 hope this helps in some way.

paul (sunderland)
June 2009