Shhhhh. We're hunting engine misfires!

Beta EVO engine misfire
Me and Mike had a quiet beer yesterday and talked over what we where going to do about solving our engine misfire. This engine has never run right in the 7200-8000rpm range, however it will pick up and run strong after this. 95HP is not a weak engine. Just to recap on what we have done some far to try and solve it:

• Replaced Spark plugs
• Replaced Spark plug leads
• Set air gap on the crank sensor
• Set valve clearances
• Installed lambda probe and validated the O2 numbers
• Swapped crank sensor
• Swapped fuel injectors
• Tried a set of colder plugs from 8 to 9

Current plan for the next dyno time

1. Install the dyno lambda into the header pipe - to ensure we are getting an accurate reading without the scavenging effecting the reading
2. Install some 10 temperature range plugs
3. Replace the coils - See if we can borrow a set of working coils from the BEARS guys
4. Install a larger earth point - Currently we are only using a M6, we are worried its not providing a good enough grounding point
5. Remove the megaphones - see if we are getting what Mike calls "megaphoneitus", its possible that the megaphones are scavenging the cylinder completely leaving us with either weak charge
6. Study the signals to the coil with a oscilloscope see if we are getting mad signals
7. Replace the ECU with a standard unit

Going to be an interesting time!!