It is much more difficult to diagnose auto with an incident that occurs intermittently rather than continuously. Most intermittent incidents are caused by poor electric connections or improper wiring. In this case, careful car problem diagnosis of suspected circuits may help prevent the replacement of good parts.
A visual check only may not find the cause of the incidents. A road test with consult or a circuit tester connected should be performed. Before undertaking actual checks, take a few minutes to list all the car trouble symptoms that encountered before the car problem occurs. Find out what trouble symptoms are present on a car and under what conditions they occur. A car diagnostic worksheet should be used. Start your car problem diagnosis by looking for conventional malfunctions first. This will help troubleshoot car drivability malfunctions on an electronically controlled engine vehicle.
Car Problem Diagnosis Directory: