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i have a 91 ls400 fitted in a cobra, we used the complete wiring harness from the car with mods by an autolec to delete unused circuits, the transmission changes up through gears perfect but will not down change apart from being done manually ,also no kick down or cruise operation ,all circuits...

HI , just finishing a conversion ls400 (91) & using original harness & ecu, engine will not rev over 2800 & seems to be running rich, (? limp mode).no codes can be shown when diagnostics are bridged, light only flashes ,i have heard there is a problem with the ecu' s in this model.. any help...

can anyone help me with a wiring diagram for a 91 ls400. i am using the loom that came with the 1/2 cut but unfortuneately the dash wiring had been cut off, we have sorted most of the wiring out but there is about 6 wires that are different to the diagram i have ..any help appreciated