Help! I'm new the the LS and to LVC, I have had my 02 LS with the 3.9 for about a week now and the engine light is now on. Plugged it in to my scanner and got...engine too lean bank one and bank two. The engine seams to be running fine, plenty of power and smooth idle. Could this have anything to do with the prior owner running 87 rather than 92 octane? Any ideas? Any help would be much appreciated..