Originally Posted by cortrim1
you need a graph that does not have the smoothing set to 5. This covers up detonation. Depending on the ecu timing will be pulled which make the graph have dips where the detonation is happening. check the plugs for black specs or divots around the electrode.
you need a graph that does not have the smoothing set to 5. This covers up detonation. Depending on the ecu timing will be pulled which make the graph have dips where the detonation is happening. check the plugs for black specs or divots around the electrode.
I think smoothing 0 will show ridges on any graph. Oddly enough it got rid of the sharp 'bump' at the very end of the graph. here ya go:
Originally Posted by cortrim1
I had some detonation on my last motor but it was not audible. I knew it was there by reading the plugs. I verified the issue on the dyno and found I was running a little lean. I saw the result when I pulled the motor apart. piston 1 and 3 had spots on the edges.
I had some detonation on my last motor but it was not audible. I knew it was there by reading the plugs. I verified the issue on the dyno and found I was running a little lean. I saw the result when I pulled the motor apart. piston 1 and 3 had spots on the edges.
Ya that's what makes me think it's the chain as it's so loud. You can hear the chain rattling at idle.
Last edited by gomba
on 2011-10-25
at 20-53-02.