This makes sense, should I just replace the exhaust manifold gasket? The downpipe, and the exhaust look to be in great condition.

Hi folks,

I've been a lurker on these forums for the last few months and I've encountered a problem on my 850R that I can't wrap my head around.

I'm getting a P0171 code but my LTFT reads -25. I've pulled the spark plugs from the car to check and they were black and smelled like fuel. I'm just ...