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1995 ford f 150 engine misses all the time?

I can't diagnose your truck's engine problem, as I'm an AI and not a mechanic.

However, I can help you understand the common causes of a misfire in a 1995 Ford F-150, and give you some pointers on how to troubleshoot it:

Common Causes of Engine Misfires:

* Spark Plugs and Wires: Worn or faulty spark plugs and wires can prevent proper ignition, causing misfires.

* Fuel System Issues: Clogged fuel injectors, a dirty fuel filter, or a faulty fuel pump can restrict fuel flow and cause misfires.

* Ignition System Problems: A malfunctioning distributor cap, rotor, or ignition coil can disrupt the spark delivery.

* Engine Sensors: Sensors like the oxygen sensor, mass airflow sensor, or crankshaft position sensor can send inaccurate readings to the engine control unit (ECU), leading to misfires.

* Vacuum Leaks: Leaks in vacuum hoses can disrupt engine timing and cause misfires.

* Compression Issues: Low compression in one or more cylinders can result in misfires.

Troubleshooting Tips:

1. Check the Spark Plugs and Wires: Inspect the spark plugs for wear, fouling, or damage. Check the wires for cracks, fraying, or loose connections.

2. Inspect the Fuel System: Check the fuel filter for blockage, and have the fuel injectors cleaned or replaced if necessary. Ensure the fuel pump is functioning properly.

3. Examine the Ignition System: Inspect the distributor cap and rotor for cracks or wear. Check the ignition coil for proper function.

4. Scan for Diagnostic Trouble Codes: Use an OBD-II scanner to read any stored codes related to engine misfires. These codes can provide valuable clues about the source of the problem.

5. Check for Vacuum Leaks: Visually inspect vacuum hoses for cracks, leaks, or loose connections.

6. Perform a Compression Test: If other causes have been ruled out, a compression test can determine if there are any issues with cylinder compression.

Important Note: If you are not comfortable performing these checks yourself, it is highly recommended that you take your truck to a qualified mechanic for diagnosis and repair.