How to inspect a spark plug for issues such as bridged gaps, deposit build-up, oil fouling, carbon fouling, normal burning, pre-ignition, overheating, and fused deposits on 2006 Ford Mustang?

Check on the spark plug to see whether there are bridged gaps and deposits due to oil or carbon. Clean if necessary. Look at oil fouling (wet, black deposits), carbon fouling (black, dry deposits). Search normal burning (light tan deposits) and overheating or fused deposits, and change spark plug where necessary.

OEM 2006 Ford Mustang Spark Plug

Ignition Spark Plug

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2 Spark Plugs found

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2006 Ford Mustang Spark Plug Part Number: PZK-1F
$10.25 MSRP: $20.73
You Save: $10.48 (51%)
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Product Specifications
- Replaced by: PZK-1F-X
- Item Weight: 0.30 Pounds
- Item Dimensions: 3.9 x 1.1 x 1.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: PZK-1F
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
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Fits the following 2006 Ford Mustang Submodels:
- Bullitt, GT, Shelby GT | 8 Cyl 4.6 L GAS
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2006 Ford Mustang Spark Plug Part Number: AGSF-24N-X
$4.75 MSRP: $7.35
You Save: $2.60 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: SP-412, AGSF-24N
- Condition: New
- Fitment Type: Direct Replacement
- SKU: AGSF-24N-X
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following 2006 Ford Mustang Submodels:
- Base | 6 Cyl 4.0 L GAS

2006 Ford Mustang Spark Plug

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2006 Ford Mustang Spark Plug Parts Q&A

Q: How to inspect a spark plug for issues such as bridged gaps, deposit build-up, oil fouling, carbon fouling, normal burning, pre-ignition, overheating, and fused deposits on 2006 Ford Mustang?
A: Check on the spark plug to see whether there are bridged gaps and deposits due to oil or carbon. Clean if necessary. Look at oil fouling (wet, black deposits), carbon fouling (black, dry deposits). Search normal burning (light tan deposits) and overheating or fused deposits, and change spark plug where necessary.