99 Exp. Sport SOHC 4.0 spark plugs different from SOHV??

[lunisic]

Vehicle- 99 explorer sport 4.0 sohc, got new plugs and wires they sent me wrong wires at first for the SOHV motor- got correct wires and replaced plugs but now I have an intermitent miss under load. I called napa they say there is no diff in part # for plugs for SOHC or SOHV motors, i'm, inclined to beieve that they are a different heat range of plugs, matter? Any help is apprecited
Chris- Performance Auto Care, Woodbridge Va

 

[celly]

Off the top of my head, I don't have a clue. Motorcraft has a great lookup for OEM parts. That should sort you out.

 

[2000StreetRod]

Thanks for the link!

Thanks for the link Celly! I checked the listing for the 2000 SOHC vs the OHV and was surprised they are the same part number and gap. I would have thought the heat range would be different since the SOHV has a higher compression ratio.

 

[dogfriend]

Vehicle- 99 explorer sport 4.0 sohc, got new plugs and wires they sent me wrong wires at first for the SOHV motor- got correct wires and replaced plugs but now I have an intermitent miss under load. I called napa they say there is no diff in part # for plugs for SOHC or SOHV motors, i'm, inclined to beieve that they are a different heat range of plugs, matter? Any help is apprecited
Chris- Performance Auto Care, Woodbridge Va

When I had an intermittent miss under load, it turned out to be a problem with the coil pack - the internal resistance was too high - there is a test given in the Haynes manual if you have it.