Re: 1990 white GT
Picture from my 3SGTE powered AW11. My Wideband sensor is positioned in the bottom section of the dump pipe just before it joins the horizontal section that goes to the rear muffler. My thoughts at that time was, this seems a little bit close to the exit of the turbo. Sure enough it was, as logging at Wakefield park the WB sensor over heated and dropped out under full boost. I have since fitted a crude but simple heat sync (seen in this picture) which so far has cured the over heating and I now have WB air/fuel ratios under full boost to review.
If you are not logging the kind of things that keep your engine out of danger under full load then you probably won't see the things that I know are important.
92' SW20 3SGTE GEN2 GT Hardtop
87' AW11 3SGTE Now Delco EFI ecu & 21 psi boost
71' KE25 3TGTE Delco EFI ecu. Unopened std engine 24 psi boost
78' KE55 L67 Delco EFI ecu