Sorry for the long delay. Today is the first day that the weather was half decent and the wifey wasn't nagging that I wasn't spending any time with the family. I hear that this is a known issue with Jeep owners. ;-)
Ok, I bought a fuel pressure test kit. Hooked it up and tried it out..
Test #1, initial test - first time starting Jeep in two weeks.
Attached it to the schrader valve.
Ran the Jeep for a minute and it stayed steady at 32psi.
Shut it off and the pressure went to 20psi and began to slowly decrease.
Test #2, disconnecting vacuum.
Started the Jeep, 32psi and steady.
Disconnected vacuum and it increased to 40psi (maybe 42).
Reconnected vacuum, engine groaned for a second and idled normally.
Pressure is now wiggling between 40 and 50psi.
Shut it off and pressure went to 30psi.
Test #3, reset computer.
Disconnected positive terminal, held it to body for 20 seconds and left disconnected for two minutes.
Confirmed computer only gave 12 & 55 codes.
Started it back up and pressure wiggles between 34 and 42psi.
The tester has a release valve and I have emptied the gas and started it up again from zero and the results were the same. I did this twice to confirm no false readings, for test #3.
So now the question is, by disconnecting the vacuum and reconnecting it, did I put the final nail in the coffin to the fuel pressure regulator, which was probably already on its way out?
OlllllO 2013 Wrangler Sahara Unlimited
lllll 1991 Wrangler Renegade, 4.0L Auto (Retired 2013)