O drove my Corolla to the point the spark plugs weren't firing and the car wouldn't start. I changed the plugs and it ran great after that.
Maintenance: 39th Oil Change (every 10K) and Tire Rotation, 13th Engine Air Filter, 13th Cabin Air Filter, 3 brake jobs, 3 coolant flushes, 2 spark plug changes w/carbon cleaning, no suspension work, no transmission service, 1 Break Down at 280K Due to a Design Flaw In The MGR Cable Which Powers The Hybrid System $5200, cat issue at 380K due to bad gas, no hybrid battery replacements in case you were wondering, does not consume oil
UPDATE: owners manual calls for replacement around 120k so I'm not that far behind i guess. Still went out and bought 4 new plugs and installed them. $80 at the dealer
Noticed before the LTFT was -6% and now its back to 0%.
We changed that spark plug and the customer was happy with the magneto drop. That spark plug worked fine on a Champion spark plug bomb test.
Champions quiet redesign of their plugs to match Tempest made up my mind. It matters, and Champion is just trying to save face.
I always run champion platinum in the coil rail 4.0s. Sometimes engines are particular.
I have measured resistance above 5k and determined the plug to be causing a problem. Typical resistance is 1-3 kOhm, sometimes less for a new one.
I was given an "offer" to have my spark plugs changed for $368!
Avoid Champions. Use NGK or Denso. Don't go cheap on plugs because the job is labour intensive.
Side note, Champion spark plugs suck. Use them in lawn mowers.
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