Ran some codes

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so i ran my codes today, cylinder 3 still misfiring, 171 bank 1 lean,174 bank 2 lean, so i changed coil packs,fuel injectors i dont know what else would cause it to misfire, could it be spark plugs?
 

jmpSHO

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Did you check the plug on cylinder 3? Cleaning your MAF my clear up the lean codes.
 

SHOZ123

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The wire loom for the plugs will fuse itself to the rear valve cover over time. This may be causing a short in the coil wiring.
 

rubydist

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Lean on one or both banks is commonly an intake leak or bad o2 sensor(s).
 
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quick question on o2 sensors, i never replaced them, does anyone have any pics on where exactly they are located? and how many are there? is there any difference in them or can i buy the same ones for all of them? thanks
 

SHOZ123

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There are only two that need changed, if indeed they do. Both before the cats. With the GREEN plugs. Bank two is easy, bank one you need to be under the car.

Best bet is Motorcraft O2s but I use cheap ones with no problems.

NTK/NGK makes the OEM ones.
 
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