Why is my jag misfiring?
The restricted performance light is on and it is misfiring I have already changed plugs this did little to help light still on and still misfiring along with a "shaking" to the engine when car is running and a "rattling" sound there is not a rod thrown so.....?
Cars & Trucks - Jaguar - XJ8 - 2001 Jaguar XJ8
Answers & Comments
If the wires are on the right plug then you could have injector problems. when you changed the plugs did you gap the plugs to specs as if they aren`t then it can cause this problem. you could also have one or more bad ignition wires.