Fuel pressure test on a Duratec 2.3L - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Tech Discussions > General Technical Chat

General Technical Chat This section is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 10-11-2011, 12:45 PM   #1
cymrieg
Focus Rookie
 
Join Date: Aug 2011
Fan#: 89163
Location: Medina, OH
What I Drive: 2004 Silver ZTS

Posts: 13
FF Reputation: 1 cymrieg Good Standing Member
Buy-Sell-Trade Rating: (0)
Fuel pressure test on a Duratec 2.3L

There appears to be no schraeder valve on the 2.3L Duratec so how to I measure the fuel pressure?

What is the 2 inch diameter cylinder about half way along the fuel rail? Regulator?

The Haynes manual doesn't cover the Duratec engine. This is a 2004 Focus ZTS.

Thanks


cymrieg is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 10-13-2011, 06:37 PM   #2
cymrieg
Focus Rookie
 
Join Date: Aug 2011
Fan#: 89163
Location: Medina, OH
What I Drive: 2004 Silver ZTS

Posts: 13
FF Reputation: 1 cymrieg Good Standing Member
Buy-Sell-Trade Rating: (0)
any one?
cymrieg is offline  
    Reply With Quote Quick reply to this message
Old 10-13-2011, 07:16 PM   #3
sailor
Crankshaft
 
sailor's Avatar
 
Join Date: Jun 2008
Fan#: 57268
Location: Williamsville, NY
What I Drive: 2004 Pitch Black ZTS 2.3 5spd.

Posts: 16,651
Points 11,878, Level 71
Points: 11,878, Level: 71 Points: 11,878, Level: 71 Points: 11,878, Level: 71
Level Up 57% Completed
Level up: 57% Level up: 57% Level up: 57%
Forum Activity 99%
Activity: 99% Activity: 99% Activity: 99%
FF Reputation: 79 sailor Excellent Standing Member
Buy-Sell-Trade Rating: (0)
That piece on the rail is there to smooth out pressure fluctuations NOT for access to check pressure...

Fuel pump cycles to maintain the pressure the computer is currently calling for (non-return system), so a std. pressure test is NOT indicated....

Unless there is NO pressure & the car doesn't run of course.....

Give us some symptoms for WHY you want to check, and we can probably help...

LOTS of good people with knowledge of these cars on here....

Luck!
sailor is online now  
    Reply With Quote Quick reply to this message
Old 10-13-2011, 07:37 PM   #4
whynotthinkwhynot
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: 20,272
Points 27,546, Level 98
Points: 27,546, Level: 98 Points: 27,546, Level: 98 Points: 27,546, Level: 98
Level Up 20% Completed
Level up: 20% Level up: 20% Level up: 20%
Forum Activity 13%
Activity: 13% Activity: 13% Activity: 13%
FF Reputation: 270 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.

Quote:
Originally Posted by the user formerly known as ZX3_Chick View Post
You're special aren't you.
whynotthinkwhynot is offline  
    Reply With Quote Quick reply to this message
Old 10-13-2011, 07:52 PM   #5
cymrieg
Focus Rookie
 
Join Date: Aug 2011
Fan#: 89163
Location: Medina, OH
What I Drive: 2004 Silver ZTS

Posts: 13
FF Reputation: 1 cymrieg Good Standing Member
Buy-Sell-Trade Rating: (0)
The engine has been running fine but suddenly from a cold start it can take cranking the starter for about 5 secs for it to start. I hear the fuel pump come on for about 2 secs before cranking.

Along with this my daughter mentioned that when driving it the car will suddenly jerk and then it is ok. Do you think the 2 are related?

I changed the plugs and fuel filter about a month ago and the car has been running fine.

I have a scan tool so I can monitor the fuel pressure with it but some how I don't trust it. Surely if the MCU saw the fuel pressure drop while driving that it would have thrown a code.
cymrieg is offline  
    Reply With Quote Quick reply to this message
Old 01-04-2013, 11:27 AM   #6
Inosimj
Focus Rookie
 
Join Date: Jan 2013
Fan#: 107931
Location: San Diego, CA
What I Drive: 2004, green, se

Posts: 1
FF Reputation: 1 Inosimj Good Standing Member
Buy-Sell-Trade Rating: (0)
My symptoms are:
It cranks fires once and continues to crank with no start.
The Code reads P0193 "Fuel Rail Pressure Sensor Circuit High Input"
Would complete failure of this sensor create a no start condition?
The car was running fine but I noticed that the last few starts required just a little more cranking. Also listening to the fuel pump on Key On No Crank, it seems like it is taking more than 5 seconds to go silent, but I have not actually measured the time .
I have actually waited until the pump stops running before I crank, with the same Fire and no start symptom.
I do not want to purchase an expensive FRPS without eliminating other less costly no start causes. The car has 160,000 miles on it and has been maintained by the Ford dealer since it was new. I purchased it from the original owner about 2 years ago and have not changed the fuel filter. (Assuming it was changed at least twice by the dealer during routine maintenance)
Inosimj is offline  
    Reply With Quote Quick reply to this message
Old 01-06-2013, 12:28 PM   #7
tmittelstaedt
Focus Enthusiast
 
Join Date: Jan 2013
Fan#: 108093
Location: Portland, OR
What I Drive: 2001 Red Focus SE Street Edition

Posts: 296
Points 233, Level 4
Points: 233, Level: 4 Points: 233, Level: 4 Points: 233, Level: 4
Level Up 66% Completed
Level up: 66% Level up: 66% Level up: 66%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 2 tmittelstaedt Good Standing Member
Buy-Sell-Trade Rating: (0)
inosimj, probably not wise to post to a 3 month old thread...

Change the fuel filter - maybe you got a bad tank of gas with a lot of dirt in it - I would probably also either change the fuel rail pressure sensor with a new one or one from a wrecker. If that doesen't fix it then fuel pumps do go out.
tmittelstaedt is offline  
    Reply With Quote Quick reply to this message
Old 01-06-2013, 12:53 PM   #8
whynotthinkwhynot
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: 20,272
Points 27,546, Level 98
Points: 27,546, Level: 98 Points: 27,546, Level: 98 Points: 27,546, Level: 98
Level Up 20% Completed
Level up: 20% Level up: 20% Level up: 20%
Forum Activity 13%
Activity: 13% Activity: 13% Activity: 13%
FF Reputation: 270 whynotthinkwhynot Outstanding Standing Member whynotthinkwhynot Outstanding Standing Member whynotthinkwhynot Outstanding Standing Member
Buy-Sell-Trade Rating: (1)
Yes, please start your own thread. Your problem is not even the same problem as the OP of this thread. Give a good description. Where you need to go is to follow the link above and back up one page to "General Technical Chat", and then you'll see a yellow button "Post Thread". Click on that, start your own thread, and you will have answers quickly. You will not get good answers posting in someone else's thread. That's called "thread-jacking" and most forum users will ignore those sorts of comments.

When you do post your own thread, please give tell us what engine you have in your car- Zetec or Duratec- and also how many miles are on the car, and any other information you might feel is pertinent to your situation.

Thanks for posting.
__________________
Be eclectic.
---The Complete How-To Archive--

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

Quote:
Originally Posted by the user formerly known as ZX3_Chick View Post
You're special aren't you.
whynotthinkwhynot is offline  
    Reply With Quote Quick reply to this message
Old 01-10-2013, 09:19 PM   #9
plex07st
Focus Enthusiast
 
plex07st's Avatar
 
Join Date: Apr 2007
Fan#: 46577
Location: Rochester, NH
What I Drive: 2007 Pitch Black ZX4 ST

Posts: 65
Points 169, Level 3
Points: 169, Level: 3 Points: 169, Level: 3 Points: 169, Level: 3
Level Up 38% Completed
Level up: 38% Level up: 38% Level up: 38%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 plex07st Good Standing Member
Buy-Sell-Trade Rating: (0)
More like 1 year 3 month old thread!
plex07st is offline  
    Reply With Quote Quick reply to this message
Reply

Bookmarks & Social Networks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:00 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Audi S3, Ford Fusion and Acura TLX. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. Challenger Hellcat - Charger Hellcat