1997 Chevrolet S10 Blazer, Codes P0102 and P0340

This 1997 Chevrolet S10 Blazer cam in with the service engine soon light on  and a complaint of low power. Checked data with Tech 2 scan tool and found codes P0102 MAF sensor circuit low frequency and P0340 cam position sensor circuit. I checked CMP retard and found it fixed at     -60 degrees. … Continue reading “1997 Chevrolet S10 Blazer, Codes P0102 and P0340”