Backfiring in 2nd and 3rd gear

[chappy]

WELL SORTED THE PROB OUT WITH BACKFIRING IT WAS A COMBINATION OF NO CATS ON THE ZAUST COS IVE DS AND THE SPARKPLUGS WHERE F*****.NOW IVE OLD ZAUST ON BUT CAR DOES NOT SEEM TO PULL RIGHT

[Lee2009]

Have u made sure all error codes have cleared.

Also was it vauxhall that told u about cat as I had same problem.

Took to Evans Halshaw and cause I had reemus on it kept cumin up code for cat and I told them this wouldn't cause backfire but the insisted on me changing exsaust to standard.

So took to another garage who specialised in Vxr and as soon as I drove In the mechanic told me my car was running on 3 cylinder and checked spark plugs and that's what it was and no more probs

Was just letting you know incase uve took exsaust off when there was no need dude

[chappy]

ya took it off then changed the plugs now its right want to put the cobra back on and the cdti box.thanks for the reply and your help dave