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Changing Plugs, Question.

Old Mar 29, 2010 | 05:19 PM
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Changing Plugs, Question.

I'm in the middle of changing the spark plugs in the truck.
My question is this, Why was there AC Delco plugs in the truck? Is this common? I'm quessing the factory plugs were already taken out?
1998 4.6ltr 2wd auto. 134,000 miles
 
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Old Mar 29, 2010 | 05:58 PM
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i thought they always used Motocraft plugs. Im guessing that they have been replaced once... You using motocraft?
 
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Old Mar 29, 2010 | 07:57 PM
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Yeah i'm putting motorcraft back in. The AC delco ones that i'm taking out were torqued down tight.
 
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Old Mar 30, 2010 | 12:05 PM
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Finished changing the plugs. I put the AGSF32FM plugs in. The truck had a stumble and ran rough. I did the plugs, clean mass air sensor and cleaned throttle body with seafoam deepcreep then did the seafoam through the brake booster line. Truck runs super smooth and has way better throttle response! Also feels like it has more power.
 
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Old Mar 30, 2010 | 06:30 PM
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the 5.4 LIKES motocraft plugs !!!
 
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