So I took the car to my local mechanic and his resident Volvo and VW expert looked at it and diagnosed the problem as having low compression in Cylinder 2. Car needs a valve job and a head gasket replacement.

Job was quoted at 1,400, but I can save about $200 by buying my own head gasket instead of ...

Take the denso iridiums and throw them at the guy who sold them to you. Iridium, platinum, stupidium...all garbage. Basic copper core are the only things that work in our cars, bro. You can buy the OEM's from the dealer, they are pre gapped. Your gap setting should be .27

So I've gathered from ...

I was using Denso Iridium plugs in it. They worked great for the 2 months the plugs were in before this current problem. They were wearing normally, save for the one in Cylinder 2, which was blackened from not firing correctly (if at all).

I cleaned off the plug and put it back in to see if things ...

Hello everyone, this is my first post, I've been looking over the forum here for quite some time though.

My Volvo 850 has recently taken a turn for the worse and idles terribly when I start it up, and runs rough when I drive it. Using an ODBII scanner, I get codes that I am having Sensor Bank ...