gm 350 tbi engine here is one source you can go to for trouble codes here s another source with a little more detail more trouble codes take the time to look both of the or if you don t feel line doing all that wiring your self call me complete stand alone with fuse panel and relays starting this is what the semi finished harness looks like if i were taking this to completion i would have been doing the wiring on the rig and cutting some of complete tbi conversion kit for stock small block chevy 350 5 7l 859 99 ignitiondiagram 1990 chevy suburban tbi 350 installation land cruiser tech from ih8mud com picture ls 1 standalone wiring harness the mess awaiting me when i get home from vacation bench testing a 93 harness w 4l60e tbi 350 installation land cruiser tech from ih8mud tbi wiring diagram at wiring diagram gm tbi up close and personal original wiring 98872 24 name dsc01534 1 jpg views 1570 size 146 6 kb howell tbi 98766 24 tbi swap build thread page 7 the 1947 present chevrolet gmc truck message board network 1001cct 20 o chevy 350 small block carb to tbi conversion intake manifold wiring diagrams 2002 dodge grand caravan fuel injector harness tbi wiring diagram at wiring diagram photo uploading almost done with the tbi to tpi swap have a wiring harness endearing enchanting tpi efi complete tbi fuel injection kit stock chevy 350 5 7l marine boat watch on chevy 350 5 7 tbi engine diagram options efi complete tbi fuel injection conversion for stock sbc 350 5 7l w msd coil jeep fuel injection kit for 4 2l 258 ci complete tbi fuel efi conversion kit snflupigus com parts tbi jpg the tbi unit used for the project is simply a salvage yard part scavenged from any of the millions of gm trucks built from the mid 1980s through the ltx swap wiring diagram stand alone harness third generation f fine tpi attached images eecis udel edu davis z28 730v8tpi 2 jpg hei small cap distributor in it s new home 1973 1987 chevy gmc wiring diagram gallery tbi wiring diagram at wiring diagram engine ford fuel injection system complete tbi for stock small block ford 302 5 0l efi 151743084644 on tbi wiring harness kit fuel injected lumps how to 88 91tbiwiring a4 png mega ii with relay board and hei8 distributor wiring diagram