[Lord of Hog]

Problems with your VIS motors are more likely to manifest themselves in general sluggishness. A duff balance motor will make it generally sleepy and a dead power motor will mean you don't get that kick of acceleration at 3200 revs.

Your warning light could be related to unburned fuel in the exhaust as a result of a knackered ignition coil. The symptoms come and go as it goes into its death throes. Being an 04 vehicle yours will take the "short" type which are reasonably easy to come by.