Test S: Step 2
2) Check For RPM Drop Turn key off. Connect a tachometer. Start engine and disconnect ISC solenoid. If RPM drops or engine stalls, reconnect ISC solenoid and go to next step. If not, go to step 4).
2) Check For RPM Drop Turn key off. Connect a tachometer. Start engine and disconnect ISC solenoid. If RPM drops or engine stalls, reconnect ISC solenoid and go to next step. If not, go to step 4).