96 850 R misfire, p0300 p0304 p0305 p1310 codes

microsuperman · Post by **microsuperman** » 05 Oct 2012, 21:46

well I did a compression test and number 4 come up with a grand total of 0psi. So I drove it to my friends auto shop and he took the head off and there is a chip missing from the exhaust valve. So that is going to be replaced. Will have to see what the guy he has do head for him says.

Post by **erikv11** » 05 Oct 2012, 22:00

The valves usually burn because of leaky valve stem seals. If you are going to put the head back on, I'd replace those seals. Would be a shame to burn another one in the next 5k miles.

guidowitz · Post by **guidowitz** » 24 Mar 2014, 18:44

I have same 1996 850 R and get P0300 and P 1310 codes after high revs under load. Car runs fine most the time at high revs but occasionally cuts out when I really step on it. But as I say, it runs very well most of the time. 180K miles. I suspect the possibility of faulty injectors, as the electrics are all up to date.
Of course I could have a sticky/burnt valve, but I don't want to think about that right now. Seafoam where are you?

Post by **rspi** » 24 Mar 2014, 19:45

LOL, go ahead and waste money while you torture yourself.

Post by **erikv11** » 24 Mar 2014, 20:03

rspi wrote:LOL, go ahead and waste money while you torture yourself.

So what does that mean, anyway?

guidowitz wrote:I have same 1996 850 R and get P0300 and P 1310 codes after high revs under load. Car runs fine most the time at high revs but occasionally cuts out when I really step on it. But as I say, it runs very well most of the time. 180K miles. I suspect the possibility of faulty injectors, as the electrics are all up to date.
Of course I could have a sticky/burnt valve, but I don't want to think about that right now. Seafoam where are you?

If this description is accurate, no way is there a burnt valve. A burnt valve has a hole in it all the time, not just under high revs. Codes also don't suggest burnt valve as they are both for multiple misfires, not for a single cylinder.

This one sounds more like a boost leak, but yes there are many possibilities.