Hi,
The fuel pressure tester is attached between the supply hose and the fuel rail. Here is the thing, Chrysler recommends Chrysler tool number 8978A to check the pressure, but trust me, you don't want to purchase one.
I attached a pic of the kit below that I found online at Freedom Racing. The price is there as well. Please sit down before you see the price. LOL
So, here is what I suggest: Contact a parts store and ask if they have a fuel pressure kit that will work with your vehicle. Most stores will lend them to you.
Next, the directions indicate using a scan tool to actuate the fuel pump. I suspect it would be fine that once you get the gauge attached, you can turn the key to the run position (engine off) to pressurize the system.
Here is a link that explains in general how the procedure is done:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
If you look below, I attached the directions from my manual.
Let me know if this helps or if you have other questions.
Take care,
Joe
See pics below. Pic 1 shows the adapters for connection and pic 2 is the kit. The last two pics are the directions.
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Saturday, March 18th, 2023 AT 8:39 PM