This is why I went back to eflex again. I ended up with black powder chit that destroyed my fuel pump, reg., blocked and in inj. and had to pull out my fuel tank (cradle out) to get it flushed. It may have been the particular servo who knows but... I have had no dramas with eflex to date (touch wood) and will continue to use it. I'm not sure wat your getting in act bellato but everytime I've tested the eflex here it has come up at 73%.