3 Check air gap. G1 Pickup SST G2 Pickup NE Pickup Thickness Gauge P10579 P10580 P Remove distributor cap & rotor. C Using SST (G1 and G2 pickups) and a thickness gauge (NE pickup), measure the air gap between the signal ro- tor and pickup coil projection. SST 09240-00020 for G1 and G2 pickups OK Air gap: 0.2 — 0.5 mm (0.008 — 0.020 in.) OK NG Replace distributor housing assembly Check and replace engine control module.