error code p0302 / #2 misfire / '98 S70

s70fighter · Post by **s70fighter** » 29 Dec 2006, 11:41

definitely cylinder #2 problem. I pulled the #2 plug wire out and there is no difference in the way it runs. When I pull the others you can see the difference it makes in the way it idles. I swapped the spark plug with another plug and it is still a #2 cylinder problem so it is not the spark plug. The wires are not that old and they are good volvo wires. Engine uses plenty of oil even though there are no leaks and little, if any smoke. When I took the spark plug out and started the engine there is a strong spark from the wire and plug. I would think that I have a valve problem but would that cause a p0302 error?

thanks in advance for any advice.

Post by **billofdurham** » 29 Dec 2006, 12:42

P0302 Code - Cylinder #2 Misfire

Further reading: http://www.obd-codes.com/trouble_codes/ ... tected.php

Bill.

s70fighter · Post by **s70fighter** » 31 Dec 2006, 19:14

Well, there is no compression in #2 cylinder. None at all....

Post by **pfeener** » 01 Jan 2007, 06:54

You're on the right track. I would strongly suspect a burned or chipped valve. Could also be stuck open just slightly or have a piece of crap stuck under it. Either way the head will need to come off. Once you get it off and flip it over, it will be readily apparent what the issue is.