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Originally Posted by Mr Hardware
If you're even remotely concerned about the health of your spark plugs, just change them. NGK BPR5EY-11 for petrol - just change them anyway, they're like $4 each.
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Curious, where did you get that ref? ngk.com.au suggests IGR5C13
http://www.ngk.com.au/sparkplug_vehicle_type.php
Ford -> Fairmont -> AUIII 4.0L MPFI, 6 Cyl, OHC, 157kW, 357Nm
As for the whine, I'll see about asking Mr. Ford how much a new pump is going to set me back.
edit: I see now that BPR5EY-11 is for a series 2 engine. IGR5C13 seem to be the expensive ($20ea) platinum ones...