I have a 2006 Volvo C70. I had the codes checked at autozone after the check engine
light came on. I got misfire codes on all cylinders plus the 300 multiple misfire code. Their computer suggested the pcv valve. It really doesn't have one so I replaced the oil trap breather kit but after a couple days the light came back on. Fuel pressure and battery is good. Spark plugs changed about 10k miles ago. Not really running rough
JA: Spark plug problems can be challenging. So many causes, some simple, some complicated. Fortunately, the mechanics we work with have tons of experience dealing with all of them. Are you hoping to fix this yourself?
JA: Great! What have you tried so far?
Customer: Replaced oil trap, checked fuel pressure, checked battery
JA: Is there anything else the Volvo Mechanic should be aware of about your Volvo?
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Volvo Mechanic about your situation and then connect you two.