Could someone send me in the right direction. I have a 01 Saab 9-5 SE with a 3.0 that has 146k on it. Recently just had head gaskets and valve cover gaskets replaced. Have probably only put about 150 miles on car since this was done and it has recently started to run really rough, sputters and sounds like it is knocking, has a loss of power, smells hot but gauge is reading normal, and coolant level is okay, check engine light is on and was at one point blinking and is throwing the cylinder #3 misfire code. The check engine light stopped blinking while driving it home and is still on but no longer blinking. Have not drove car since this happened. Questioning if the gasket and valve cover job were bad or could it be something related to this. Want to send it back to garage that did the work just want to make sure that if it's something that was caused by this that they come good for it. Ideas on what it could be and how I could trouble shoot myself before having it towed back there. Plugs? Head bolts need to be tightened? Could it be the gaskets still?