Bosch +4 Plugs | Ford Explorer Forums

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Bosch +4 Plugs

FXplorer

Member
Joined
October 5, 2004
Messages
26
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City, State
Loxahatchee, Florida
Year, Model & Trim Level
'99 XLT
Has anyone had problems with these plugs. I was planning to change my plugs on my X this past weekend (ran out of daylight). Managed to swap out driver side 3 plugs from Bosch +4 to Autolite double plat. The far plug (closest to EGR plumbing) had 2 outer electrodes touching the center one. Is this due to misfire and overheat? I have no mech. damage to the cylinder, only 2 out of the 4 were collapsed.
 






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