Hi All,
I need some help please. I have a 2.0L pinto with a fast road kent cam with twin 40 webers with a megajolt electronic iginition, The engine runs fine up to 4000rpm then misfires (almost a cough and back fire 2 or 3 times) then carries on until 5,500 rpm with no issues.
So far I have changed the coil pack and plugs, changed the settings on the megajolt, re jetted the carbs (mains and airs), checked the webers for air leaks which appears ok. but I still cant find the issue.
I did change the setting on the megajolt and the issue went away during a short drive but after leaving the car for an hour the issue came back. The megajolt appears to be keeping its settings as far as I can see.
I am running out of ideas. Any help comments greatly appreciated,
Thanks Ian