what plugs you running
09-30-2012, 09:57 AM
#16
Senior Member
Super turbo-fire quad nuclear-tipped flame blasters with magnetic pulse-alignment technology. They're belt-driven. 
I'll now be getting 400 miles per gallon. While parked. On the highway they actually scavenge exhaust fumes from the air and turn them back into gasoline, filling my tank as I drive.
Eh. or plain old boring NGK copper cores.
I'll now be getting 400 miles per gallon. While parked. On the highway they actually scavenge exhaust fumes from the air and turn them back into gasoline, filling my tank as I drive.
Eh. or plain old boring NGK copper cores.
09-30-2012, 10:41 AM
#17
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Year: 1996
Model: Cherokee
Engine: I6 4.0L HO, JBA headers, 99 intake, #703 injectors
running e3s they were cheap and on sale 
shoulda done some research but well see how they turn up. so far not to bad. alittle more throttle responce but no milage or power increase. well see how they turn out in a few thousand miles. ive heard some dumb**** happening around 3-8k miles or so. well see. 
shoulda done some research but well see how they turn up. so far not to bad. alittle more throttle responce but no milage or power increase. well see how they turn out in a few thousand miles. ive heard some dumb**** happening around 3-8k miles or so. well see.
09-30-2012, 11:16 AM
#18
I disagree about the hype. There are some cars that do actually benefit from specialized spark plugs such as platinum or multi-tip. I would say most XJs do not really benefit from the hyped up plugs, BUT- in later model XJ distributorless ignition systems (AKA the waste-spark systems), the platinum plugs are recommended for increased longevity. I don't really want to have to change my plugs in my 01 every 15K miles- so I think they matter.
09-30-2012, 11:32 PM
#20
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Model: Cherokee
Psst....if you store them in an oxygen-rich environment (I recommend one of those nursing home oxygen tents cranked up to 25 atmospheres), they release that stored O2 in operation, acting as a mini-supercharger. You'll love the difference.
09-30-2012, 11:36 PM
#21
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
What about adding a fine distilled water mist? Could help tackle carbon deposits and cool the electrodes to prevent detonation
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10-01-2012, 06:30 AM
#24
Senior Member
Good idea-I'll try that! I'll probably make 400 HP with that alone.
10-01-2012, 06:45 AM
#25
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I disagree about the hype. There are some cars that do actually benefit from specialized spark plugs such as platinum or multi-tip. I would say most XJs do not really benefit from the hyped up plugs, BUT- in later model XJ distributorless ignition systems (AKA the waste-spark systems), the platinum plugs are recommended for increased longevity. I don't really want to have to change my plugs in my 01 every 15K miles- so I think they matter.
J.C. Whitney always has some interesting spark plugs.
10-01-2012, 06:54 AM
#26
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Originally Posted by cruiser54
The recommended interval is not 15,000 miles, is it?
10-01-2012, 07:01 AM
#27
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
30,000 was the factory interval at least up until the coil packs came out and they did fine at that interval.
10-01-2012, 07:05 AM
#28
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Originally Posted by cruiser54
30,000 was the factory interval at least up until the coil packs came out and they did fine at that interval.
Although I'm sure of the really low compression ones here would benefit from 15 haha
10-01-2012, 07:07 AM
#29
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Year: 1990
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10-01-2012, 08:12 AM
#30
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Year: 1999
Model: Cherokee
Engine: 4.0 I6
champion coppers
nothing special but for 1.99 you cant beat it
so what if i replace them once a year...its 12 dollars...i can handle it and my jeep loves them
tried bosch and other types...jeep developed a rough idle
champion coppers it idles smooth
nothing special but for 1.99 you cant beat it
so what if i replace them once a year...its 12 dollars...i can handle it and my jeep loves them
tried bosch and other types...jeep developed a rough idle
champion coppers it idles smooth