2.7L Low Pressure Fuel Sensor

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Apr 21, 2021 | 02:05 PM

A/Ox4

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From: Missouri

2.7L Low Pressure Fuel Sensor

Can anyone confirm the location (or supply a diagram) of the low pressure fuel sensor on a 2.7L? I believe there is a high and a low, correct me if I am wrong. It is reading a cosntant 5V so either its gone bad or the wiring is loose or soemthing.

Apr 23, 2021 | 07:03 PM

diesel_dan

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From: Foothills, CA

Quote:

Originally Posted by A/Ox4

I can't help you with sensor location, but it just stuck out that you are reading 5V - on what? An OBDII device or connected device? (Forscan, Torque, etc.) Only because that is what VREF should be reading (voltage reference) and I've seen where some PIDs are mis-named or not programmed correctly in the app. So if my assumptions are correct you are looking at VREF, and not at the PID for Fuel Pressure, if there is one (which on the 6.0 PSDs there isn't, so we add a FP sender/gauge)...

I haven't played with Torque on the new truck, but use it a lot on the 6.0...

Apr 23, 2021 | 07:05 PM

A/Ox4

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9 ECHO 1

Joined: Aug 2009

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From: Missouri

Well, I had an error code for a fuel pressure issue. It was a silent code with no CEL. But I checked my fuel pressure with Forscan and I got the 5v which I recognized as reference voltage, so I was thinking maybe it was bad or grounded.

Apr 23, 2021 | 07:17 PM

diesel_dan

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From: Foothills, CA

Quote:

Originally Posted by A/Ox4

If that's the case (set a code), then there is a PID for FP (low and/or high?)... But my bet is you aren't on it, or it isn't correct in Forscan... Need to ask what the PID is for Fuel Pressure(s) are? Sorry I can't help more, but I figured one of these out in Torque on the 6.0 side when Trans Temp was always the same as Coolant - it turned out that you had to edit the PID and change where the data was being requested from - OBD Header from Auto, to Trans...

I doubt they just got one wrong...