A fuel pressure sensor with a 0-5v output (pretty much all of them) can be connected to the ecu-GN. Don't be confused on the sensor power voltage. Some sensors are powered by 5v, some 12v, but still output a 0-5v signal.
The sensors have 3 wires: power, ground, and signal. Assuming you have the power and ground squared away, you just need to connect the signal wire to the ECU. One method is to run a wire through the firewall to the ECU, or you can use one of the EGR wires since those won't be used anymore for EGR. The ECU has been designed to use those wires as analog inputs. There are also 5 more analog inputs (ADC01-05) at the terminal strip on the side of the ECU. (see the Extra inputs and Outputs doc on the flashdrive)
The EGR plug has 4 wires. 12v power, ground, grey, brown. The grey and brown are both analog inputs to the ECU. (pink/black is 12V ignition power, black is ground)
The Brown wire is "Analog In 1" (which goes to D9 at the ECU)
The Grey wire is "Analog In 2" (which goes to A4 at the ECU)
You can connect the fuel pressure sensor signal output to one of those analog inputs. For this example, let use Analog In 1, the brown wire. You'll need to tap into the wire, unless you have a connector that fits it. By the way, Caspers Electronics makes a harness for this, part 109037 (www.casperselectronics.com), which uses the 12v and ground from the EGR to power the sensors, so make sure you have 12v powered sensors if using that harness.
Once you've made your wiring connection, we can connect to the ECU with your laptop to set up the input.
You'll need to set up a Generic Sensor on the Advanced Engine menu. These settings assume you have a typical AEM or SSI 100psi style 5v sensor that outputs .5 to 4.5 volts (0 to 100psi). If you have something different, post here and we can figure it out.
The sensor will be called "Sensor 6" or "Fuel Press PSI" in other parts of the software if you want to make a gauge. I set up that sensor in PSI for gauge purposes. If you want to use fuel pressure correction, you will also need a sensor set up in kpa.
In that case, make another sensor in position 07, still using analog in 1, call it Fuel Press KPA, and use -86 and 776 for the 0v and 5v settings. Sometimes you'll need to bump the 0v setting around a little to make it read zero.
The ECU will now have fuel pressure as an input, but you'll want to see it on a gauge, so we need to go over making a gauge. I'll make a post about making gauges.
The sensors have 3 wires: power, ground, and signal. Assuming you have the power and ground squared away, you just need to connect the signal wire to the ECU. One method is to run a wire through the firewall to the ECU, or you can use one of the EGR wires since those won't be used anymore for EGR. The ECU has been designed to use those wires as analog inputs. There are also 5 more analog inputs (ADC01-05) at the terminal strip on the side of the ECU. (see the Extra inputs and Outputs doc on the flashdrive)
The EGR plug has 4 wires. 12v power, ground, grey, brown. The grey and brown are both analog inputs to the ECU. (pink/black is 12V ignition power, black is ground)
The Brown wire is "Analog In 1" (which goes to D9 at the ECU)
The Grey wire is "Analog In 2" (which goes to A4 at the ECU)
You can connect the fuel pressure sensor signal output to one of those analog inputs. For this example, let use Analog In 1, the brown wire. You'll need to tap into the wire, unless you have a connector that fits it. By the way, Caspers Electronics makes a harness for this, part 109037 (www.casperselectronics.com), which uses the 12v and ground from the EGR to power the sensors, so make sure you have 12v powered sensors if using that harness.
Once you've made your wiring connection, we can connect to the ECU with your laptop to set up the input.
You'll need to set up a Generic Sensor on the Advanced Engine menu. These settings assume you have a typical AEM or SSI 100psi style 5v sensor that outputs .5 to 4.5 volts (0 to 100psi). If you have something different, post here and we can figure it out.
The sensor will be called "Sensor 6" or "Fuel Press PSI" in other parts of the software if you want to make a gauge. I set up that sensor in PSI for gauge purposes. If you want to use fuel pressure correction, you will also need a sensor set up in kpa.
In that case, make another sensor in position 07, still using analog in 1, call it Fuel Press KPA, and use -86 and 776 for the 0v and 5v settings. Sometimes you'll need to bump the 0v setting around a little to make it read zero.
The ECU will now have fuel pressure as an input, but you'll want to see it on a gauge, so we need to go over making a gauge. I'll make a post about making gauges.
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