man this etest is killing me, 5 tests and all fails. Im running too lean after my new o2 sensor, and I don't want to replace it not knowing the out come, my best test was with MAF #2, i got 1600 Nox with a 750 limit, worst was 2600, I dropped the 2600 down to 1600 with MAF#2, I though my original MAF would richen up the mixture but with no other changes it went form 1600 to 2200 today, I tryed to retard the timnig, I got it down to 1600 from 2200. So ive put the MAF I got 1600 with back in, the timing was retarted to about 4-5 degrees during the test and the HC and Co stayed the same so im gonna run it right back to 0 degrees (with the diagnostic port pluged in, in reality it will not be 0, closer to 5). Im running some fuel system cleaner in hopes of removing some carbon buildup to reduce temps and NOx. Ill try 89 gas instead of 87 and just keep praying. If anyone knows a way to slightly increase the fuel ratio with the MAF or any other means It would be really helpful. Im also gonna clean the EGR as best I can, I know i works if i hook a vacuum up to it. Any help (maybe a crooked testing facility ?) id really apreasheate it *hugs and kisses
