But there is 2 negatives one is for a chassis or engine ground and the other is for the ecu. Which pin would that be on the car?You can just ground the negative and run the positive source to the ecu. Should be able to scale in tunerstudios or it might have a drop down selection for the auto meter gauge.
The stock Ford computer will not run off of a wideband O2 sensor. It needs the original Ford O2 sensors to work properly.I have the autometer pn4379 and it is not programmable. The wideband has a negative and positive output for the ecu. Do I use both? It is a 0-4v gauge. Do I need to scale for this wideband or what? Thanks for the help
On the mspnp, is it not setup somewhat similar to a pimp system? The ms controller only needs to see the 0-5v from the analog output to a signal input. Shouldn’t it not matter if it’s grounded to the ecu? I’ve ran it this way on several cars and never had any inconsistencies.You cant just ground both of them, take the heater ground to chassis and the sensor ground needs to go to the ecu.
Here is why, all the sensors are monitored as a differential voltage if you simply ground the sensor anywhere then it may have a voltage drop between the two controllers over the chassis ground. Taking the sensor ground to the ecu ensures that the voltage offset differential between the two devices is at a minimum. Any installation other than this method is technically not correct.
If you tell me what MS system you are using exactly I can tell you where to connect them.
any inconsistencies that you have noticed perhaps.On the mspnp, is it not setup somewhat similar to a pimp system? The ms controller only needs to see the 0-5v from the analog output to a signal input. Shouldn’t it not matter if it’s grounded to the ecu? I’ve ran it this way on several cars and never had any inconsistencies.
Depends on the WB controller, if you are using something like the spartan2 it comes with a spreadsheet that is used to account for this voltage offset from an improper installation. Even something like powering the WB from a different source than the ECU relay for instance can cause this discrepancy.All Numbers I see on the megasquirt match up exactly to the readout on the wideband controller. Good enough for me.
I can see that. The aem I’m using was originally tied to my old quarterhorse using the 5v signal input from the egr valve. It worked well then, with the analog output and wb controller both grounded to 2 different places - independent of the eec.Depends on the WB controller, if you are using something like the spartan2 it comes with a spreadsheet that is used to account for this voltage offset from an improper installation. Even something like powering the WB from a different source than the ECU relay for instance can cause this discrepancy.
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