Hi All,
Looking for some help tracking down an intermittent misfire on my O2 Justa.
Occurs intermittently in any gear at approx. 3000 RPM, under moderate load.
I have tried the obvious, new plugs, wires, coil, etc.
So I plugged in AutoEngenuity scan tool with the attached results.
None of the reported codes are in the Bently diagnostic literature, so was wondering if anyone can help me figure this out.
Also MIL light is not illuminated
Many thanks.
Jeff

 

If plugs, wires, etc are all OK, next step is too investgate the mechanical items....so typically you would do a compression check, both wet and dry to check the pistons and the valves.... Excessive wear in either can cause low compression, leading to misfires. Valve issues are VERY common on gen1 cars...often caused by low octane fuel burning s valve... Then then get soft...and wear or crack...sometimes cam or lifter wear can cause issues if the oil has been run low or at low psi.