Hi guys this is my first troubleshoot question.
Car: A31 Cefiro
Engine: RB20DET from R32
ECU: MEC-R212B with Nistune
Mods: FMIC, custom intake manifold, SARD Fuel pressure regulator, SARD R2D2 BOV, Airtex Fuel Pump
I'm having an intermittent problem with the revs cutting off at 4000-4500rpm.
I thought it was a wiring problem, so I had the whole wiring harness retraced and fixed.
It came out again after spending hours in the dyno. Car was running okay during first few passes. Then it started to develop some choking problems around the same rev range but would run through redline.
Then the last problem kept on cycling, cutting off. Consult reported Knock Sensor error which is equivalent to detecting a knock. Tried to run the car even with a stock map, same problem.
Please help...