Quote:
Originally Posted by Banshee
Interesting notes. The old plugs (NGK LZTR5AIX-13 ) were still ok, so they went into boxes in case I ever need a spare. With the new plugs (NGK PLZTR5A-13) & leads, I am getting some radio interference. Not a lot, only when the head unit is on FM and in certain places. It seems to correlate with locations that the radio signal would be attenuated by geography. ie. I can count on hearing it at the bottom of the street where It's the bottom of a steep valley here, but it's gone at the top of the street.
On the other hand, my fuel economy seems to have improved by at least 1L/100km so far, though the jury's still out. No change to driving style. Local driving would normally see the gauge indicate ~14.5-15.5L/100km, but it's currently down to 14.0 and still falling, in the usual stop/start local driving.
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New spark plugs will go a long way to improving performance and fuel economy, as will cleaning and re gapping old plugs in good condition. A quick clean of the throttle body is often a good idea at the same time.
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Jeep TJ rebuilt 4.0L, Custom Steel Roof Racks, vintage ((Jeep specific)) 15” Centerline Hellcats,
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