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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Spark Plug Gap

 
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Old 05-05-2019, 07:37 PM
Christopher Workman
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Spark Plug Gap

What should the spark plug gap measurement be on a 4.9l Straight 6 engine?
 
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Old 05-05-2019, 10:31 PM
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Originally Posted by Christopher Workman View Post
What should the spark plug gap measurement be on a 4.9l Straight 6 engine?
1986; Copper Resistor Spark Plug; GAP - 0.044

What altitude are you operating in ?
 
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Old 05-06-2019, 09:58 AM
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Should be on this label under the hood. On the front radiator support.

Mine says Gap .042 - .046
 
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Old 05-06-2019, 10:24 AM
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Originally Posted by Wagonboy View Post


Should be on this label under the hood. On the front radiator support.

Mine says Gap .042 - .046

I believe Mr. vjsimone pretty much nailed this one: "1986; Copper Resistor Spark Plug; GAP - 0.044"
 

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