Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Visual Inspection: Notes
This inspection will identify modifications or additions to the vehicle operating system that may affect diagnosis. Inspect the vehicle for non-Ford factory add-on devices such as:
- electronic add-on items:
- air conditioning
- generator (alternator)
- engine turbo
- cellular telephone
- cruise control
- CB radio
- linear booster
- backup alarm signal
- computer
- Vehicle modification:
These items, if not installed correctly, will affect the powertrain control module (PCM), or transmission function. Pay particular attention to add-on wiring splices in the PCM harness or transmission wiring harness, abnormal tire size, or axle ratio changes.
- Leaks; refer to LEAK INSPECTION .
- Correct linkage adjustments; refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS for E-series, or AUTOMATIC TRANSMISSION EXTERNAL CONTROLS -- F150 PICKUP .
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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