NGK Plugs

Jim Hill /
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I've got a 1980 Grande and put in an NGk B6HS

spark plug. Rode it about 150 miles, and it started

running like it was going to die on me. Took out the

plug, put in another B6HS plug and it runs fine. Do

you think it will do it again at around 150 miles, and

does anyone know why it might be happening ? Thanks.

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