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I have read a lot of post on the forums that mention swapping fuel injectors to help with EGT and GAMI spreads. I have not seen an overview of the process from ground zero. As I have read some of the threads it seems as simple as swapping the high EGT injector with the low EGT injector. As I read more it seems like there are contributing factors to EGT discrepencies such as induction leaks, probe placement, spark plugs and fine wire spark plug cables. I asking this because my plane is going in for its annual and would like idea of what questions to ask before having them swap injectors or if I need to at all. I have a 82 J with a EDM 700, FT 101 fuel flow indicator and GAMI injectors. My FT101 appears to be almost .5 GPH off indicating a higher fuel burn but I have a few result of flights I can share. Flight #1 5500 MSL, 24" MP, 2400 RPM, 9.4 GPH LOP. #1 1421 356, #2 1407 321, #3 1360 308, #4 1425 333 Flght #2 7500 MSL, WOT 22.5"MP 2500 RPM, 9.5 GPH LOP, #1 1417 352, #2 1408 326, #3 1348 290, #4 1447 343 The best I can tell so far my GAMI spread is between .2-.5, I'm still playing with it but my feeling is .3, but is that possible wth almost 90 degree difference in EGT's. The order in which the cylinders peak is #2,#3,#1,#4 After I get the EGT's figured out I'm going after the CHT's Any advice is appreciated.