Friday, June 3, 2011

Want to change spark plugs in my 99 Crown Vic P71. Anyone have any luck or recommend a high performance plug?

I want to see if my Crown Vic will perform better with maybe platinum plugs or something different. Anyone recommend Bosch or another brand in their Vics? Hows the performance and can you tell the difference? Thanks!Want to change spark plugs in my 99 Crown Vic P71. Anyone have any luck or recommend a high performance plug?Stick with the OEM Motorcraft. the long part number is AGSF-32PM, short number is SP-493, they have the extended threads to help prevent spark plug blowout. Use a torque wrench when tightening the plugs and do it when the engine is cold. torque spec is 13-15 ft-lbs.



the majority of problems we see at my dealer with running rough and misfires are caused by the aftermarket and performance spark plugs. once replaced with OEM, they run fine.Want to change spark plugs in my 99 Crown Vic P71. Anyone have any luck or recommend a high performance plug?I wouldn't go with Bosch for your Vic. Stick with motorcraft and you won't have any new problem. These engine hated anything other then motorcraft.Want to change spark plugs in my 99 Crown Vic P71. Anyone have any luck or recommend a high performance plug?Motorcraft spark plug called for this car is platinum and never a problem,Bosch is not a good choice for spark plug.

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