ECMlink [RESOLVED] Help wire up a fuel pressure sensor

[miliman13]

Im trying to wire in a fuel sensor to log with ecmlink.
But i cannot find anything that confirms that the orange wire on the 2g maf is infact the baro input.

Also i dont know were to acces a 5v source ...
Since the 5v maft wire is alredy in use to power my sd setup.

 

[dustyboner]

the orange wire is correct for the baro signal

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im not really sure about the 5V. maybe you could use something like THIS

 

[SexyDSM95]

Do you have WB02 and simulating NB02? If so, then you could use the “front 02” or “rear 02”.

http://www.ecmtuning.com/wiki/externalsensorinput

You can also the ECU 5v rail for power and ground: http://www.dsmlink.com/images/forums/2GECUPinout.pdf

 

[miliman13]

so now the issue is on link i see negative 5psi........ for fuel pressure..
what are your settings ?

 

[miliman13]

https://www.ecmtuning.com/wiki/ecuinputdata

So can someone clear this up..
The wiki says the fuel sensor to baro
must use ECU ground as well ?
This negates what others have posted while using the input..

 

[miliman13]

currently
5V from maft to red sensor
chasiss ground to black sensor
orange from maft to green sensor

 

[miliman13]

I confirmed via multi meter that i am in fact getting 5volts from both locations..

ok.. so even though i have 5v source from from AIT
Its doesnt do anything for the pressure sensor

But when i disconnect my SD and use the 5V from the SD plug my fuel pressure sensor logs correctly : Regardless of how i ground, via chassis or ECU.

I of course cant start the car but i activate the fuel pump in link and measure

Why is that?

 

[Vegas Smith]

May I ask what sensor you're using?

 

[miliman13]

idk the exact model
i bought it a few semester ago and just now installed
But same type as any other auto-meter Honeywell Aem pressure sensor.

SO TO CLOSE>!
car does in fact log using only the 5v from the sd setup which is wired in place of the MDP

And taping the 5V source from maft/ AIT sensor wont work!!

ANY GROUND WORKS!



This is great for me since my fuel-lab gauge broke on install yrs ago
And other random dial gauges were showing 60psi base...
And now thru link its confirmed this whole time it was 60psi

Fuel lab gauged showed 40psi..........



This is for the future so when people google: "how to log fuel pressure..."
They will actually find an answer!!

PS no messing with the ECU de-soldering r39

 

[Vegas Smith]

I'm confused, you did get it to work? I was going to say that some of these cheap chinabay sensors have been known to be faulty right out of the box.

 

[SexyDSM95]

I’m confused as well. I think he just tapped the SD wiring from the ECMLink adapter harness for the 5v wire?

The 2nd link I posted shows ECU PIN 81 as the sensor voltage. The sensors eventually tie back to that wire/pin.

 

[miliman13]

I'm confused, you did get it to work? I was going to say that some of these cheap chinabay sensors have been known to be faulty right out of the box.

I’m confused as well. I think he just tapped the SD wiring from the ECMLink adapter harness for the 5v wire?

The 2nd link I posted shows ECU PIN 81 as the sensor voltage. The sensors eventually tie back to that wire/pin.

car does in fact log using only the 5v from the sd setup which is wired in place of the MDP

#1 .My MAP sensor is wired into the old MDP location.
#2 My ait is wired throught the MAFT
#3 Fuel sensor is 5v comes from MAP
Ground from chasis and signal throught MAFT baro wire.

I do not have any plug and play harness.
I clearly stated that the 5v from the maft side WILL NOT work!.

But but but........
Are they same feed?
I thought so too, but for what ever reason it works only from the 5v source from the MDP wire.

Im sure one of our many electrical engineering members has an idea.
Electrical is not my displine.
Dont care why, it is what it is.

 

[Nicholas Gironda]

Couldn’t you just wire it to the stock fuel pressure sensor that use to plug into the solenoid? Or any other sensors you have eliminated like egr and such?