You're not going to "shake" any codes here. 3 people already told you those plugs don't work on that engine
[color:"red"]AND YOU ARE STILL CONFUSED? [/color] This engine uses "Ion-sensing" technology, which like dan said uses the plug as a sensor during the exhaust stroke. Using other plugs may be confusing the computer, since different plugs have different construction/internal resistance/materials etc.
Isuzu, Delphi to use ion-sense ignition
Isuzu Motors Ltd. and Delphi Automotive Systems Corp. say their ôion senseö ignition subsystems ù in use for the past year on Isuzu Troopers and Rodeos ù have enabled cuts in emissions and fuel usage while adding value by integrating functions.
The ion-sense system consists of an individual ignition coil for each cylinder and a central control module, none of which have any moving parts. After the spark fires the cylinder's air/fuel mixture, the system applies a DC current to the sparkplug gap, turning the spark plug into a sensor. When there are ions present in the gap, there are changes in the DC current that can be translated into useful information about the effectiveness of the combustion process.
Delphi says the ion sense system eliminates the need for the individual crankshaft, camshaft and rough-road sensors typically used for engine-management information. Also, the in-cylinder sensing of misfire and knock is an improvement of most current methods.
2eyefishclaw []
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04-04-2004, 09:53 PM Re: Would like to put in 87 octane, but car seems to ping. Any suggestions? (Post #8)
if its 2000 or newer it may have champion plugs if so remove them and use only nippendenso its what works best with the Ion sense module
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So if Isuzu goofed up by putting Champion spark plugs that wouldn't even work correctly when the truck rolled off the assembly line, I suppose I can't bust your balls about not listening to what people have suggested. <img src="/forums/images/graemlins/pfft.gif" alt="" />
The whole system seems mysterious to me and very complicated. I can see how it could measure a/f ratio of exhaust gas, but how can it determine pinging? It must measure wether fuel is present and when it turns to exhaust gas, maybe if it ignites too early compared to crank position, the ecm determines the engine is pinging. Good stuff though either way.
