Checking rail fuel pressure

[PLohr]

I've seen it mentioned that the rail fuel pressure can be tell of a high pressure pump or injector issue. I have about 180K miles on the high pressure pump and injectors. No issues yet but I would like to see if the rail pressure is normal. Is there a certain type of scanner that will give a read out of rail fuel pressure?

I have a cheap Launch scanner. I also have an EFI Live system which I use on a GM truck. I could be wrong but I don't think the EFI Live system works on the Dodge / Cummins platform prior to 2006. Our truck is a 2003.

Would a Snap-On scanner give a read out of rail fuel pressure?

Other suggestions are welcome.

Thank you for any help.

 

[Darkbloodmon]

You'd have to look at the specific features/models of the scanner to see if it has the ability to do so. I use Blue Driver on the regular and know for a fact it won't pick up most if any of the finer details on older diesel trucks. I know from experience that HP tuners VCM scanner will pick it up if you happen to have the hardware.

I would recommend a rail pressure gauge if you're looking to keep your truck long term. I'm really happy with my IssproEV2s expensive, but the quality of the products and the kit components are really stand out.

 

[PLohr]

Thank you, Darkbookmon. Not a bad idea on the fuel rail pressure gauge. I was hoping to use a scanner but so far haven't found anyone saying any certain model will read fuel rail pressure.

I found out that the EFI Live system definitely won't work with a 2003 Dodge / Cummins.

 

[Monroefiredog1]

I would recommend a rail pressure gauge if you're looking to keep your truck long term. I'm really happy with my IssproEV2s expensive, but the quality of the products and the kit components are really stand out.[/QUOTE]

Hey Darkbloodmon, Can you tell me more about the IssproEV2s kit for the rail pressure. Where does it attach to the rail? What comes in the kit and how much trouble are they to install?

 

[Darkbloodmon]

I would recommend a rail pressure gauge if you're looking to keep your truck long term. I'm really happy with my IssproEV2s expensive, but the quality of the products and the kit components are really stand out.

Hey Darkbloodmon, Can you tell me more about the IssproEV2s kit for the rail pressure. Where does it attach to the rail? What comes in the kit and how much trouble are they to install?[/QUOTE]

The IssproEV2 rail pressure gauge comes all inclusive of materials needed for wiring it up. The gauge uses a piggy back connector off of the OEM rail pressure sensor. The instructions are well written and easy to follow. I ordered 5 EV2 gauges from Genos and wired them together following the instructions. I'm not an automotive electrical specialist by any means but my setup looks really clean and professional for my first time doing any wiring work or gauge installation. Take your time and do the wiring like you want to do it once. Don't have a rats nest of wires on or near you battery's like some trucks have.

 

[SSage]

The Edge CTS monitors show rail pressure, intake temps, rpm, boost water temp etc. When I added up boost, egt, and trans temp gauge cost I realized the Edge monitor gave me a few more readings for less money even with the Edge wiring hub thingies.

Here is mine when I first turned it on:

 

[GrantP]

I have an older innova scan tool that will monitor live data from various sensors, including rail pressure. I'm not plugging innova because mine is a PITA to use and the buttons are not at all intuitive, I bring it up just to point out you don't need to pay snap-on scanner prices just to read rail pressure.

 

[AH64ID]

You will get a code if it's too high or too low. The issue with just looking at a FRP gauge is that you don't know what the commanded FRP is to compare it to.

I watched it in my 05 with a MM3 and on my 18 with a CTS2. On the 05 I wrote the FRP map so I knew what was normal, and on the 18 it's stock and just fun to look at (when I actually look).