Originally Posted by LOS
Eric, is it possible he needs to clear the code first and then try it again?
I'm saying clear the code first, switch the plug/coil and try it. Maybe he left the old code there??
If I'm not mistaken, codes are stored until clear.
Thanks for the vote of confidence but I am not up on how check-engine-lights behave. I have a Peake tool and I use that to clear them when in doubt. Don't know what to tell you if it isn't easy to clear the codes.
One thing I DO know is that just because the CEL doesn't come right back on after you reset it doesn't mean the problem is fixed. I believe it takes about 20 minutes of an out-of-tolerance condition to trigger the light, and all may seem OK until then.
2006 Honda Odyssey EXL-RES
2006 Honda Accord V6 EX-L Sedan
1999 BMW 540i 6-Speed (Sold to M3UOND on 9/21/06)
1991 Honda Civic Si - Occasional Beater