What Causes Rough Idle and Hesitation (How to Fix)

There are several potential causes of rough idle and hesitation in a vehicle. Some common reasons include

• Damaged or incorrectly installed spark plugs or spark plug wires
• Vacuum leaks
• Clogged air filter
• Faulty PCV valve
• Faulty fuel injectors
• Carburetor problems
• Dirty fuel injectors
• Problems with the ignition or fuel injection systems

How to Fix causes rough idle and hesitation

A rough idle and hesitation in a car can be caused by various factors. Some common causes include a vacuum leak, clogged air filter, defective PCV valve, faulty spark plug, dirty fuel injectors, and carbon deposits.

To fix these issues, you may need to clean the carburetor, check all vacuum hoses, replace the distributor cap and rotor, replace the spark plugs and wires, clean or replace the fuel injectors, and replace the EGR valve if it is stuck open due to carbon deposits.

It is recommended to take your car to a repair shop to diagnose and fix the issue.