[quoteThese plugs don't work well in Isuzu's and have been noted to cause CEL. [/quote]

I think your statement that Bosch Platinum plugs cause CELs on Isuzus needs to be clarified a bit. Bosch Platinum plugs are known to cause problems on Isuzus that have the Ion Sensing ignition. Not sure if '99 Rodeos have this ignition or not, if not these plugs shouldn't cause a CEL.

Steve

'97 Rodeo 5spd. 3.2L SOHC V6 4WD