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Can someone please help me with wiring in the Haltech flex fuel sensor on single turbo series 1 2jz-gte non-vvti? I have it installed but have no idea how the wiring works with attaching it to a 5volt sensor. Do I just bridge into any 5volt sensor in the engine bay, harness, or directly into ECU? I know its been covered countless times but I have never seen one photo or video of the finished wiring installation location.
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It’s not 5v, it’s 12v as clearly written in the diagram you posted. This can come from any switched 12v source. Ground goes to chassis ground. Signal goes to a digital input on your ECU. Stating which ECU you have would help. If it’s a Haltech 2500 this input would be a synchronized pulsed input (SPI).
 
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89 Turbo - 2JZGE-T VVTi 6062
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It’s not 5v, it’s 12v as clearly written in the diagram you posted. This can come from any switched 12v source. Ground goes to chassis ground. Signal goes to a digital input on your ECU. Stating which ECU you have would help. If it’s a Haltech 2500 this input would be a synchronized pulsed input (SPI).
this but you're gonna want signal ground from the ECU instead of chassis ground
 
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