Here are some of the most likely culprits:
* Ignition System Problems: A misfire in one or more cylinders is a common cause of shaking and a blinking check engine light. This could be due to faulty spark plugs, ignition coils, wires, or even a failing distributor (less common in newer F-150s).
* Fuel System Issues: Problems with fuel injectors (clogged or failing), a fuel pump malfunction, or low fuel pressure can cause a rough running engine and shaking.
* Transmission Problems: While less likely to directly cause a blinking check engine light, transmission issues *can* contribute to shaking, especially when accelerating. A slipping transmission or low transmission fluid could be at play.
* Engine Sensors: A faulty mass airflow sensor (MAF), throttle position sensor (TPS), or other engine sensors can send incorrect information to the engine control unit (ECU), leading to a rough idle and shaking. The ECU will register these problems as a fault and illuminate the check engine light.
* Vacuum Leaks: A leak in the engine's vacuum system can disrupt the proper functioning of various components, resulting in a rough running engine.
* Engine Mounts: While less likely to cause a blinking check engine light, worn engine mounts can cause excessive vibration felt throughout the vehicle, especially during acceleration.
What you should do:
1. Pull over safely: Find a safe location to stop driving immediately.
2. Have it towed: Do not attempt to drive the truck further, as you risk causing more extensive damage.
3. Get a diagnostic scan: Take your F-150 to a mechanic or auto parts store (many offer free diagnostic scans) to get the check engine light codes read. This will provide crucial information for determining the exact cause of the problem. The codes will help pinpoint the issue.
4. Repair the problem: Once the diagnosis is complete, have the necessary repairs made. Ignoring a blinking check engine light could lead to expensive repairs down the line.
Ignoring this problem could lead to significant engine damage and costly repairs. Professional diagnosis is essential.
