OK.Thanks,If he did a compression test on cylinder #3 then if he found low compression,yes it may solve the problem.These cars also have a tendency to develope leaking head gaskets.If there is a misfire code,or a misfire on startup,he may want to pressure test the cooling system and make sure there is no coolant going into the cylinder.Pressure test the cooling system and leave it on for an hour or so,then pull the plug and look for coolant in the cylinder.Hope this helps!Thanks
If I have helped you please accept and leave positive feedback. My reputation is important to me.If you need further assistance, please ask. Thanks BONUS is always appreciated!!