Good morning ,

cosworth 4x4 92 , dark greens , close loop , MSD stage 2 ( manually limited 1,3 bar no amal valve ) , scorpion exhaust no cat ,T3 hybrid,group A coil, blue ignition leads, RS500 cooler, pipercross cone under fender, 3 bar MAP,-31 actuator.

I changed the distributer cap , rotor , new denso plugs.
Lambda gives signs of being rich above 3000 RPM , fuel pressure is nicely rising with the turbo pressure.

Car drives great only when coming on boost above 3500RPM , RPM meter dances like crazy and by 5000RPM sounds like rev limiter comes in ???
When boost is brought down to like standard 0.8 bar it is happening almost not


Gaps on the crank and the ditributor are OK and these sensors I replaced like 10000km ago .

Not sure what to do next ...

Steven