When did you first notice the issue with your vehicle?
How often does the problem occur?
Are there any secondary problems that happen at the same time?
Does the problem happen during certain driving speeds?
Do certain weather conditions affect the issue you are having?
Have any other vehicle operators noticed this issue?
Have you had any recent repair performed to vehicle?
Has the vehicle been involved in any accidents?
How may times per week or day does the problem occur?
Does the problem happen when the engine temperature is hot or cold?