Adding a fuel pressure sensor to my MS2

[devastator]

I've searched the MSEFI forums for this answer, but just haven't quite found what I'm looking for.

I want to add a Fuel Pressure Sensor to my MS2 V3 running B&G code V2.89.
Here is the sensor:
http://www.aemelectronics.com/100-psig- ... s0l0js7ste

Now for the questions:
1.) Is it possible to hook this into the JS4 imput? If not, where can I add it?
2.) How EXACTLY do I need to reconfigure my MS2 board to accept this unput, (wiring diagram, resistors, whatever)?
3.) Do I need the GPIO board in order to add this sensor?
4.) How do I configure MT to datalog and display the input from this sensor? By this I am asking for a more detailed explanation than "edit the ini file". How EXACTLY do I need to change the ini file?

Thanks in advance.
Dev

[Matt Cramer]

I've searched the MSEFI forums for this answer, but just haven't quite found what I'm looking for.

I want to add a Fuel Pressure Sensor to my MS2 V3 running B&G code V2.89.
Here is the sensor:
http://www.aemelectronics.com/100-psig- ... s0l0js7ste

Now for the questions:
1.) Is it possible to hook this into the JS4 imput? If not, where can I add it?

Yes.

2.) How EXACTLY do I need to reconfigure my MS2 board to accept this unput, (wiring diagram, resistors, whatever)?

A 1K resistor from JS4 to the sensor output should be OK at a minimum - a duplicate of the TPS input circuit may be better.

3.) Do I need the GPIO board in order to add this sensor?

No.

4.) How do I configure MT to datalog and display the input from this sensor? By this I am asking for a more detailed explanation than "edit the ini file". How EXACTLY do I need to change the ini file?

Thanks in advance.
Dev

That I don't have - there is a write-up on the MS2/Extra site that migth be close enough, but I haven't tried it myself with B&G code.

http://www.msextra.com/doc/ms2extra/MS2 ... m#addgauge

[devastator]

Thanks Matt.

That I don't have - there is a write-up on the MS2/Extra site that migth be close enough, but I haven't tried it myself with B&G code.

http://www.msextra.com/doc/ms2extra/MS2 ... m#addgauge

Been reading that all morning, between moments of banging my head against the wall.

I'll give it a shot.

[devastator]

That I don't have - there is a write-up on the MS2/Extra site that migth be close enough, but I haven't tried it myself with B&G code.

http://www.msextra.com/doc/ms2extra/MS2 ... m#addgauge

"There are 2 ADC (Analogue to Digital Convertor) inputs (JS4 and JS5) on the MS2 processor that can be used to send a 0-5V signal to."

Is this true for a regular MS2 board as well? In other words, can I use JS5 instead of JS4?

[Matt Cramer]

This is true for all MS2 variants - as long as you're not already using JS4 or JS5 for something else.

[convertables_10]

What sensor are you going to run on your fuel pressure? Im planning a new combo and being able to monitor my fuel pressure would be awesome.

[devastator]

What sensor are you going to run on your fuel pressure? Im planning a new combo and being able to monitor my fuel pressure would be awesome.

http://www.aemelectronics.com/100-psig- ... s0l0js7ste

[convertables_10]

Im wondering if i could use an autometer sending unit and do the same. The aem unit is just a little to pricey for me to justify it. If i could spend what i would spend on a gauge its justifyable.

[devastator]

The Autometer fuel pressure sending units I looked up cost more than the AEM setup, and didn't have a pigtail.

[convertables_10]

Ill check into it later today while im at work. I get a good deal on parts we carry here.

[LesTroyer]

not to hijack the tread - but why not use an oil pressure sendor -- most have the same range & would think the materials used would be able to handle gas as well as oil -- or does the ethonol cause a failure.

Les

[devastator]

I have considered using an oil pressure sender for a while now, but I didn't find an affordable version that would send a 0-5v signal. Ethanol shouldn't hurt it at all.

[convertables_10]

Ill check and see what kind of signal the factory sending unit has for a signal out. If its volts i could create a look up table and do it that way. There should be a way to figure it out using a factory sender. As long as it has a 1/8th npt it should work on most fuel systems.

[msiddalingaiah]

not to hijack the tread - but why not use an oil pressure sendor -- most have the same range & would think the materials used would be able to handle gas as well as oil -- or does the ethonol cause a failure.

Les

I tried one of these VDO pressure senders:

http://www.egauges.com/vdo_send.asp?Sen ... I_5Bar_VDO

They work, but they are slow and not particularly accurate. I was using it for electronic fuel pressure regulation.
I ended up using a Bosch Fuel Rail Pressure (FRP) sensor that's commonly found on mid-2000 Ford Focus on many Ford trucks.
You can read about it here:

http://www.madhu.com/content/Main/FuelPumpController

There was a guy on eBay that was selling the sensor for $20 or so. You can find them at junk yards also. It's five volt compatible. I called Bosch and got the pin connections. It's documented on the website above.

[devastator]

I ended up using a Bosch Fuel Rail Pressure (FRP) sensor that's commonly found on mid-2000 Ford Focus on many Ford trucks.

Were you able to tie it into an MS2 and datalog it?

[msiddalingaiah]

Were you able to tie it into an MS2 and datalog it?

I only had MS-I at the time, but myk777 did exactly what you want to do:

http://www.msextra.com/forums/viewtopic ... 91&t=37883

His datalogs are in the thread.
You might contact him for the details.

[devastator]

I only had MS-I at the time, but myk777 did exactly what you want to do:

http://www.msextra.com/forums/viewtopic ... 91&t=37883

Thanks for the response. My concern is that all of the code I see is for MS1 or MS2-Extra, and not for MS2. Certainly I can't be the first to do this, but I'll be darned if I can find anyone posting up how they did it.

[msiddalingaiah]

Thanks for the response. My concern is that all of the code I see is for MS1 or MS2-Extra, and not for MS2. Certainly I can't be the first to do this, but I'll be darned if I can find anyone posting up how they did it.

I believe myk777 was using MS2. As Matt said earlier, you can connect the AEM sensor output (green wire) to JS4 through a 1K resistor.
Connect the red wire to +5 volts (VRef) and the black wire to ground.

You can test it out on the bench. Just connect to JS4 to VRef (careful not to connect it to +12!!) and you should see 5V in MegaTune/TunerStudio.

That should do it.

[devastator]

Thanks!