Fuel pressure is practically worthless to chase once you know its to spec. Check it and forget it. You need to do a fuel volume test if you actually want to diagnose -- Providing the correct amount of fuel at WOT will tell you where the issue is and you can work backwards. Unless you've been burning a quart a week for the last 5 years, its fuel related so forget about the cat its fine.

Basically this is it -- if you get the correct fuel quantity in 60 seconds, its the EHA and/or distributor, but most likely eha. If you don't get the specific quantity, its downstream either filters or pumps. Don't take this as advice to start with replacing parts. Do the test and report back.

__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k