Updated spark plugs?
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Year: 1989
Model: Cherokee
Engine: 4.0w/703 injectors
Updated spark plugs?
I have been using the regular recommended Champion copper 344 spark plugs in my 89 renix 4.0. But I recently did the 703 injector swap and added a rustys air tube and k&n filter. With those mods Is there any benefit to putting in more updated plugs like platinums or something else. Or should I just stick to the Champions?
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I've run Champion coppers,autolite platinums,NGK,and NGK iridiums. I always seem to run back to NGKs'. If they still made the original DELCO rapidfires I'd use those though.
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There are only two things a sparkplug has to do, light off the cylinder, and continue to do so reliably for a decent period of time. If the cheapies are getting that done there is nothing further to gain.
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
AND be in the correct heat range so the cylinder doesn't light itself off For best results stick with the cheapies. Fancy stuff often isn't correct for our engines.
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Year: 1989
Model: Cherokee
Engine: 4.0w/703 injectors
Yeah thats what I figured. I put Bosch double platinum plugs in my ex wife Saturn once, and they were yhe crapiest plugs I had ever seen. They burned way too hot. They didn't even last long. Anyways, thanks for the input.
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