Hi my 1998 vr6 devloped a bad misfire took it the garage turned out plugs and leads were bad so had them replaced also a faulty MAF censor had that done cleared the faults all good.But im still getting a judder sometimes between the 1,000 and 2,000 rev range when driving the car anythink after that and shes fine.I opened my bonnet tonight to have a look for any sign of arcing and to my surprise when I looked down at the plugs I could see arching from the leads to the body well the bit where the plug is in.Is this normal or has the garage fitted the wrong type of leads and could this be whats causing my judder problem any feedback would be great thank you.