I'd say between 3500 and 4500 RPM. Usually only one time each run going through the gears. It's fairly consistent when it's hot or cold. It almost always happens at the point right before shifting to the next gear.

It is the same situation as two years ago. I did put a fresh tank of gas in it. I did buy a new set of plug wires and I'm going to throw in a new set of plugs when I swap it out.

I have a new set of headers for it and I'm planning on installing those, new wires, plugs, new o2 sensors, and a new CAT........when I get the time.

Thanks again.

 

I was able to get the codes scanned this past weekend and this is what I got:

p013 - Bank 1 (left) O2 sensor, open circuit
p036 - OptiSpark high resolution signal faulty
p041 - Ignition control circuit, open

I did install a new O2 sensor on the driver's side last week. Nothing else has changed the misfire is still consistent as always.