* Spark plug gap varies by model: The gap depends on the specific type of spark plug recommended for your car. You need to check your owner's manual or consult a reputable repair manual for your 1986 Mustang 5.0L.
* Condition matters: Even if you find the general gap, the actual gap on your existing spark plugs might be off. This is why it's vital to measure the gap with a spark plug gap gauge and adjust if necessary.
Here's how to find the right information:
1. Consult your owner's manual: It should have a section on engine specifications and recommend the correct spark plug type.
2. Look up your car's details: Websites like AutoZone, Advance Auto Parts, or Motorcraft let you search for your specific vehicle and find the recommended spark plug type.
3. Consult a repair manual: Haynes and Chilton manuals are excellent resources for detailed information on your car's engine.
Remember: The spark plug gap is crucial for proper combustion. A too-wide gap can lead to misfiring, while a too-narrow gap can cause overheating.