Changed distributor and fixed CAS code. Tried all means to erradicate knock sensor code, new shielded cable direct to ECU, two new knock sensors, and it didn´t work.. I´m going to leave that code alone.
Put a grounding kit, was having resistance problems on the grounds (33Ohms), problem fixed.
Installed wiring and sensors for new display gauges. Saw that fuel hose was cracked and changed it.