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mikethejackal
06-30-2017, 09:10 AM
hello all! i've got a problem with my 03, and hopefully someone can help shed some light on it. last night while driving home, in rush hour traffic, my car started to idle rough, with the rpms dropping fast, just as i got her onto the shoulder she died. she would start, then immediately die again. i ran the codes and got p0191, which is low fuel pressure i believe. i got her towed home and looked through the forums to see if this was a common problem, and it doesn't seem to be.
i cant hear the fuel pump buzzing, and she has a half tank of gas. she has around 168k miles, and no real performance mods. the temp outside was high 90s, not super hot for texas just yet. i havent checked the fuses yet, and will as soon as i get back home.
my question is: is there a test that i can perform (i am mechanically inclined) to check if it is the fpdm, or the fuel pump? also, where is the fpdm?

fastblackmerc
06-30-2017, 09:15 AM
FPDM is in the trunk on the left side behind the carpet close to the inertia switch.

RubberCtyRauder
06-30-2017, 09:18 AM
https://mercurymarauder.net/forums/showthread.php?t=56597

if you don't hear fuel pump when key is on, read the link

fastblackmerc
06-30-2017, 09:20 AM
When was the last time, if ever, the fuel filter was replaced?

martyo
06-30-2017, 09:34 AM
Do you have an SCT programmer?

mikethejackal
06-30-2017, 01:57 PM
Fuel filter was replaced 4 months ago, yes an sct 1725 I think.

mikethejackal
06-30-2017, 02:05 PM
Thank you rubbercty for that link!