Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Fuel pressure test on a Duratec 2.3L
View Single Post
Old 10-13-2011, 07:37 PM   #4
Captain TMI
whynotthinkwhynot's Avatar
Join Date: Jan 2005
Fan#: 18416
Location: the armpit of TN, Memphis, TN
What I Drive: 05 Focus Wagon; 13 C-Max SEL

Posts: 20,623
Points 30,063, Level 100
Points: 30,063, Level: 100 Points: 30,063, Level: 100 Points: 30,063, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 28%
Activity: 28% Activity: 28% Activity: 28%
FF Reputation: 273 whynotthinkwhynot Outstanding Standing Member whynotthinkwhynot Outstanding Standing Member whynotthinkwhynot Outstanding Standing Member
Buy-Sell-Trade Rating: (1)
You have a return-less fuel injection system. All you have is a fuel sensor in the center of the rail. There is no FPR. The fuel sensor sends information to the PCM, and it regulates voltage to the fuel pump to maintain pressure.

If you really must know what it is, there are 2 ways to figure out fuel pressure. The first of which is to use a scan tool that is capable of monitoring fuel pressure. The second is to cut a mechanical fuel pressure gauge into the fuel line. There is a test, but seeing fluctuations wouldn't be uncommon. I can go find out how to do that test if you want. There might be a test function in the electronic odometer that shows FP, but I don't know what the display will look like, and I would expect the number to be in kPa not psi.

Generic fuel pump tests like 1) Key off, all accessories off 2) turn key to on 3) listen for fuel pump sound buzzing- if it buzzes for longer than 5 seconds your fuel pump is struggling, and could be on the way out. If you don't hear it, then you probably don't have a working fuel pump. I would double check several times- including have someone remove the fuel cap and listen there while you cycle the key.

What's wrong with the car? Is this a crank but not start issue?
Be eclectic.
---The Complete How-To Archive--

Moderating everything now, let me know if I can help.

Originally Posted by the user formerly known as ZX3_Chick View Post
You're special aren't you.
whynotthinkwhynot is online now  
    Reply With Quote