what spark plugs on the 4.0?
I know the 4.7 has to have specific special copper core plugs, but does the 4.0 care?
I know the 4.0's in my cherokees ran like crap with expensive platinum and multi-point plugs, and prefered the cheap champion 1.99 truck plugs, but what about this newer 4.0?
I've had it for about 60 thousand miles, and the last thing the PO did was change the spark plugs to correct a cyl 5 misfire... dont know what plugs he used.
I've had 3 CEL's in the last few months. Cyl 5 misfire, Cyl 4 misfire, random/multiple cyl misfire.
All were on long trips, and all corrected themselves within a few days.
I figured spark plugs would be a good place to start.
The plugs that one of the fleet mechanics said to use are either champion plat power, PN#3034 , or autolite platinum AP985
both are stocked parts at my autozone, both are 2.99 each.
Anyone have any other suggestions?
Installing HID's in stock housings is bad.
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"When you see someone who needs help, help them. When you see someone who needs a hug, hug them... Help those who can't help themselves." -Sgt Andrew Tingwall, NMSP. End of watch 6-10-2009