LT5 wont run with all cylinders

[Mika73]

I guess many have already read of my problems from CF forum. But problem continues and we dont know whats wrong and what should be tested next when it feels like everything is tryed and tested. It just wont work.

http://forums.corvetteforum.com/sho...283&forum_id=50

Cylinders 2 and 7 wont work ok.

There is not ok spark on cylinders 2 and 7. There is spark, but not like it should. Spark is discontinuous.

Both O2 sensors show full reading (really rich).

I been told that it would be like winning on lotto if both O2 sensors would go at same time.

- Shop manual diagnostics done
- Dis and ECM changed
- Coil places changed
- Injectors tested (Flow ok and resistance 12.3-12.5ohms)
- Cylinders pressure tested about 200lbs
- Sparkplugs changed and plug wires tested

Thanks
Mika