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Idle and fuel pressure

Road Tuning

Discussion and questions related to the course Road Tuning

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I have purchased haltech fuel pressure sensor (HT-010910).

Sensor is wired correctly (avi15 to 750 elite + 5 volts supply + sensor ground 0 volt) and located into the fuel pressure regulator’s gauge port. I have inserted the same voltage number that is written on the paper which came with the sensor. Pull-up is disable. However, I still have no reading to my fuel pressure number display!!. Can someone provide me the correct way to calibrate it , please ? Maybe I have forget something is important !! I don’t know.

Another point might promote to what I have said is : I am using o2 closed loop system, because of that I see my VE numbers at idle is unrealistic (77%). What I think is that the ecu have no feedback of what happened to the fuel pressure regulator when it is vacuumed at idle. Am l right ?

Note :

-engine is 2jz

-injectors are 1000cc fic (dead time is correct)

- fuel base pressure is 53 psi without the idle vacuum and I have inserted this number to the base fuel pressure on my main page setup.


Couple questions:

- Are you 100% sure the signal wire is wired into the correct pin on your ECU?

- Have you confirmed via a volt meter that you are getting voltage on your 5volt supply? (try grounding the volt meter from your ground pin on your fuel pressure sensor pigtail to confirm you definitely have power and ground)