[dean]

Hi

After changing the spark plugs on my uk year 2000 turbo today(no go faster parts installed) i've now got an hideous misfire.(plug gap not checked, NGK PFR6B, that was what was in there)

It really is bad from idle through to the upper rev range but most noticeable on wide open throttle.

I've disconnected the battery for about 3 hrs to attempt an ecu reset then went out for a mixed drive of some 20 miles but nothing improved.

Any suggestions please. If the air box hadn't been put back together properly could this cause it?

Thanks

Dean