If the setting is not correct, we need to make an adjustment. All accessories should be offwhen we make adjustments, including the cooling fan. Keep an eye on the dwell meter, and turn the idle air bypass adfustlng screw on the throttle valve until the duty cycle is correct.

      If this adjustment solves the problem we're done and the car is ready to roll. If it doesn't then the next step is checking to see if the idle stabilizer is properly functioning.

A simple check for the idle stabilizer's proper functioning can be done by switching the ignition on, but not starting the car. Place your hand on the idle stabilizer to feel whether or not it is vibrating. If it's vibrating, it's probably okay, and we can go on to checking the idle switch. If it is not vibrating then we need to check ifit's getting any voltage.

      Turn off the motor, then turn the ignition on without starting the car. Unplug the connector (See photo). Takillg care not to damage the connector, check for battery voltage (about 12V) between the center terminal and ground (the intake manifold is a good ground) and about IOV between the center terminal and each of the two outer terminals.

      If there's no voltage, the problem is somewhere in the harness or ECU, and you'll need to check the wiring and dig deeper into the Bentley Manual for a solution. It is common for the wires inside the rubber boot on the idle stabilizer to break, so check there first. If there is voltage, the next step is to check the condition of the electrical components of the stabilizer.