What Causes a Sudden Increase in Fuel Consumption After Replacing the Ignition Coil?
1 Answers
Generally, the ignition coil in a vehicle does not affect fuel consumption. If the ignition coil is damaged, it may cause engine shaking, jerking, or misfiring, but these issues can be resolved after repair. There have been no reported cases of increased fuel consumption due to a faulty ignition coil. It is recommended to investigate other potential causes, such as the fuel injector, spark plugs, oxygen sensor, or coolant temperature sensor. Since the ignition coil is an electronic component, please observe the following precautions when replacing it: 1. Replace All: When replacing the ignition coil, it is advisable to replace all of them at once. Replacing only the faulty part may increase the likelihood of issues arising in the other, previously functional ignition coils. 2. Ensure Spark Plugs Are Fault-Free: When replacing the ignition coil, check whether the spark plugs are functioning properly. Using worn-out spark plugs can place a significant burden on the ignition coil, so it is recommended to replace the spark plugs at the same time as the ignition coil. When replacing the spark plugs, ensure they are securely connected. 3. Check for Connector Damage: When replacing the ignition coil, carefully inspect the vehicle's wiring connectors to ensure the pins of the wiring harness are undamaged. Under normal engine operation, high temperatures can degrade the connectors, making them prone to damage during ignition coil replacement. Damaged connectors may fail to secure properly, leading to poor conductivity.
