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Old 09-23-2010, 05:38 PM
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1998 f-150 issues....

hey guys, my brother has a 98 f-150 with the 5.4L v-8 in it. i think it has somewhere around 150,000 miles on it. the truck intermittantly runs rough almost like it is missing on one cylinder. the check engine light is on but the code is for Bank 2 running lean...i intend on replacing the plugs for him but was wondering if anyone else had any feedback? thanks!
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Old 09-23-2010, 05:44 PM
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If the plugs have never been replaced, I would replace allof them. If they have been replaced more than likely it is a coil pack.
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Old 09-23-2010, 05:50 PM
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even with the code saying bank 2 lean? i was nervous and thought it was a fuel problem...
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Old 09-23-2010, 06:00 PM
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It could be the injector. I had 98 f-150 with 98k that was missing realy bad so I replaced all plugs and back two coil packs 1 on the driver and 1 on the passanger side. The coil pack on the back drivers side went out 2 more times.
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Old 09-23-2010, 06:04 PM
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ok i will start with the plugs and go from there...i hope thats all it is. any tricks for doin the plugs? looks pretty tight in there..
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Old 12-09-2010, 07:41 PM
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bank 2 of what? bank 2 O2 sensor? faulty O2 sensors can cause that, and worse fuel mileage, because of getting a false reading, sending it back to the computer, thus giving wrong A/F ratio. Plugs is definatly a plus. i had a buddy with one that had over 200k on it, and he did have a spark plug blow out of the head once. but put it back in, and ran fine. Just be careful, and be thankfull its not a newer 3v 5.4, otherwise you can have over $200 wrapped up in just tools to get the damn spark plugs out. (my dad has one, and 2 broke off in head)
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