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Inlet Temperature Sensor Not Working?

JimX

By JimX,
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JimX Grand Master

JimX

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Is the inlet temperature sensor part of the AFM? It makes sense that it would be, since it measures the temperature difference in airflow to send the signal to the ECU. On my PowerFC diagnostic screen, it has "---" for the inlet temperature.

Does this mean it's not getting the signal at all? Is there any reason why the AFM would work but not send the temperature, because it otherwise seems to work fine (response, power, etc). If the sensor is attached elsewhere or if there is a common reason why it wouldn't be showing me the inlet temp, can someone please advise? I think this is the main source of my crap fuel economy, if it thinks the engine is always cold it'd be like driving around with the choke constantly on!

Edit: I should note, I have installed a Q45 AFM and re-wired the plug as per instructions I found here awhile back. I did it all over a year ago so don't ask me what I wired up to what :P I spliced it into the loom so that it still has the original plug, but tucked up out of the way and insulated. Is it possible I did something wrong there?

Edited by JimX
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Bl4cK32 Grand Master

Bl4cK32

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Posted (edited)

do you have an r32 gtst with the AP PFC model, or a gtr with a pfc?

They remap a 32 gtr PFC to use on the 32 gtst, and the r32 gtst doesnt have the inlet sensor (std in a gtr) so it normally shows ---.

You can wire in a sensor though and it will display the inlet temp :P

edit / inlet sensor is located in the inlet maniold near the throttle body

Edited by Bl4cK32
JimX Grand Master

JimX

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Ah right. Does it use the inlet temperature to adjust cold start fueling, or does it use the coolant temp? If the latter then I guess I don't need to install one. Otherwise where can I get one and how do I wire it in? I have an R33 GTS-t sorry (should have said in original post).

JimX Grand Master

JimX

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Ah ok. Thanks for all the info, I guess I'll put a priority on getting a new O2 sensor now. The economy has been steadily getting worse since I got it, and not all due to power mods. Light-footed highway driving should essentially be the same as it always was but it's not.

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