* Misfire(s): This is the most likely culprit. A misfire occurs when one or more cylinders aren't firing properly. Causes include:
* Worn spark plugs or wires: These are common wear items and should be inspected and replaced if necessary.
* Faulty ignition coil(s): The coil provides the spark; a failing coil can cause misfires in one or more cylinders.
* Bad distributor cap and rotor (if applicable): Older vehicles like the '97 Malibu might have a distributor; worn components here can disrupt spark delivery.
* Low compression in one or more cylinders: This could indicate worn piston rings, valve problems, or a head gasket leak. This requires a compression test to diagnose.
* Fuel injector problem(s): A clogged or malfunctioning injector prevents proper fuel delivery to a cylinder.
* Vacuum leaks: A significant leak in the intake system can disrupt the air-fuel mixture, leading to misfires.
* Catalytic Converter Issues: A severely clogged or damaged catalytic converter can cause backpressure that leads to misfires and a blinking check engine light.
* Engine sensor failure: Though less likely to directly cause a *blinking* light (more often a steady light), a severely faulty sensor (like the crankshaft position sensor or camshaft position sensor) can disrupt timing and indirectly lead to misfires.
What to DO:
1. Do NOT continue driving extensively with a blinking check engine light. You risk serious engine damage.
2. Get the codes read immediately. An OBD-II scanner (available at most auto parts stores) can read the diagnostic trouble codes (DTCs) stored by the car's computer. These codes will pinpoint the likely cause.
3. Based on the codes, address the problem. Sometimes it's a simple fix (spark plugs), other times it's more complex (worn piston rings). A mechanic might be necessary for more involved repairs.
Ignoring a blinking check engine light can lead to costly repairs, so addressing it promptly is crucial.
