Engine running very rough - Page 4 - 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    
FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 03-14-2013, 11:15 AM   #31
danny42984
Focus Jr. Enthusiast
 
Join Date: Feb 2013
Fan#: 110560
Location: bristol, TN
What I Drive: 2001 maroon focus

Posts: 25
FF Reputation: 1 danny42984 Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by FocusRus View Post
Tee in either before or after the filter.....hopefully, there is a shrader valve on the fuel rail (opposite) the fuel pressure sensor. Also, turn the key on, engine off...reset cel....then start engine...let idle til warm. You can enter live data mode on the scanner to watch warm up data. And if possible, do not touch the throttle.....let it idle on it own and if needed apply a little throttle to help warm the engine up. Now when the system goes into closed loop...start recording or when water temp hits say 180-190 or above. If it will stay running.......run the engine say 12 - 15 mins. I interested in whether or not the system switches from open to closed loop......
Unfortunately the scanner I have does not have a live data stream display. The fuel rail doesn't have a schrader valve either.
danny42984 is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-15-2013, 02:09 PM   #32
1turbofocus
FF Affiliate
 
1turbofocus's Avatar
 
Join Date: Oct 2003
Fan#: 1123
Location: Belmont, NC
What I Drive: 2000 ZX3 / 2002 SVT Turbocharged

Posts: 22,357
Points 51,787, Level 100
Points: 51,787, Level: 100 Points: 51,787, Level: 100 Points: 51,787, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 32%
Activity: 32% Activity: 32% Activity: 32%
FF Reputation: 154 1turbofocus Excellent Standing Member 1turbofocus Excellent Standing Member
Buy-Sell-Trade Rating: (28)
No Zetec Focus has a schrader valve , There is nothing to suggest that your recorded fuel psi is off , I would look into the filter , sock and or fuel pump

Open loop or closed loop has nothing to do with your lack of fuel psi this needs to be addressed first , get the fuel psi up to the 34 to 43psi it should (you should NEVER see 65psi ) be then see what other issues you have , the ECU cannot not raise the injector duty cycle enough at idle or low load part throttle to make up for the 19psi so that alone could show a lean condition on the STFT and cause you to stay in open loop

If your only seeing 19psi fuel at idle, I would address that first

Tom
__________________
Focus-Power: Your #1 Source for Ford Focus Speed, Tuning & Performance!

Customer Support
AIM: hpdyno
Email: hpdyno@aol.com
Phone: 704-249-3745
Site: focus-power.com

Elder 1turbofocus
1turbofocus is offline  
    Reply With Quote Quick reply to this message
Old 03-15-2013, 02:17 PM   #33
FocusRus
Focus Addict
 
FocusRus's Avatar
 
Join Date: Feb 2013
Fan#: 109798
Location: Waggaman, LA
What I Drive: 2004 Silver Sedan SE

Posts: 588
Points 356, Level 7
Points: 356, Level: 7 Points: 356, Level: 7 Points: 356, Level: 7
Level Up 12% Completed
Level up: 12% Level up: 12% Level up: 12%
Forum Activity 8%
Activity: 8% Activity: 8% Activity: 8%
FF Reputation: 3 FocusRus Good Standing Member
Buy-Sell-Trade Rating: (9)
Tom, good to see you...what took you so long? Lol.
__________________
SR#269 'I know where the 'zetec' kicks in....'
FocusRus is offline  
    Reply With Quote Quick reply to this message
Old 03-15-2013, 05:11 PM   #34
danny42984
Focus Jr. Enthusiast
 
Join Date: Feb 2013
Fan#: 110560
Location: bristol, TN
What I Drive: 2001 maroon focus

Posts: 25
FF Reputation: 1 danny42984 Good Standing Member
Buy-Sell-Trade Rating: (0)
Ok, got the pressure tester and with the ignition switch on the reading is around 45psi. With the engine running it goes up around 85psi. When it gets up to around the 80psi mark thats when it starts its "squealing" sound from the fuel pump. Any ideas?
danny42984 is offline  
    Reply With Quote Quick reply to this message
Old 03-15-2013, 05:21 PM   #35
danny42984
Focus Jr. Enthusiast
 
Join Date: Feb 2013
Fan#: 110560
Location: bristol, TN
What I Drive: 2001 maroon focus

Posts: 25
FF Reputation: 1 danny42984 Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by 1turbofocus View Post
No Zetec Focus has a schrader valve , There is nothing to suggest that your recorded fuel psi is off , I would look into the filter , sock and or fuel pump

Open loop or closed loop has nothing to do with your lack of fuel psi this needs to be addressed first , get the fuel psi up to the 34 to 43psi it should (you should NEVER see 65psi ) be then see what other issues you have , the ECU cannot not raise the injector duty cycle enough at idle or low load part throttle to make up for the 19psi so that alone could show a lean condition on the STFT and cause you to stay in open loop

If your only seeing 19psi fuel at idle, I would address that first

Tom
The Focus I'm working on has the SPI engine instead of the Zetec.
danny42984 is offline  
    Reply With Quote Quick reply to this message
Old 03-15-2013, 05:21 PM   #36
FocusRus
Focus Addict
 
FocusRus's Avatar
 
Join Date: Feb 2013
Fan#: 109798
Location: Waggaman, LA
What I Drive: 2004 Silver Sedan SE

Posts: 588
Points 356, Level 7
Points: 356, Level: 7 Points: 356, Level: 7 Points: 356, Level: 7
Level Up 12% Completed
Level up: 12% Level up: 12% Level up: 12%
Forum Activity 8%
Activity: 8% Activity: 8% Activity: 8%
FF Reputation: 3 FocusRus Good Standing Member
Buy-Sell-Trade Rating: (9)
It should never be that high! I'll let Tom take this one, though the fuel pressure is not being regulated.....fuel pressure regulator, but is it?.
__________________
SR#269 'I know where the 'zetec' kicks in....'
FocusRus is offline  
    Reply With Quote Quick reply to this message
Old 03-15-2013, 05:32 PM   #37
danny42984
Focus Jr. Enthusiast
 
Join Date: Feb 2013
Fan#: 110560
Location: bristol, TN
What I Drive: 2001 maroon focus

Posts: 25
FF Reputation: 1 danny42984 Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by FocusRus View Post
It should never be that high! I'll let Tom take this one, though the fuel pressure is not being regulated.....fuel pressure regulator, but is it?.
I would think it would be a regulator for sure on an older non computer controlled car but this..I just dont have the experience on newer cars. Oreilly's auto parts website dont even list a fuel pressure regulator for it. I was thinking maybe it doesnt have one and is regulated by the sensor on the fuel rail?? I lost. Any advise from anyone with more knowlege would be greatly appreciated.
danny42984 is offline  
    Reply With Quote Quick reply to this message
Old 03-15-2013, 05:40 PM   #38
1turbofocus
FF Affiliate
 
1turbofocus's Avatar
 
Join Date: Oct 2003
Fan#: 1123
Location: Belmont, NC
What I Drive: 2000 ZX3 / 2002 SVT Turbocharged

Posts: 22,357
Points 51,787, Level 100
Points: 51,787, Level: 100 Points: 51,787, Level: 100 Points: 51,787, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 32%
Activity: 32% Activity: 32% Activity: 32%
FF Reputation: 154 1turbofocus Excellent Standing Member 1turbofocus Excellent Standing Member
Buy-Sell-Trade Rating: (28)
You are correct , altho my knowledge of the SPI engine is very limited , the fuel rail psi sensor is what what tells the ecu what the fuel rail psi is , if its bad this may also be why your reader was showing low but I have never seen that

You might (Focus Zetec and SVT does) have a fuel pump driver module under the rear pass seat that sends the voltage to the fuel pump , I would also check this

Tom
__________________
Focus-Power: Your #1 Source for Ford Focus Speed, Tuning & Performance!

Customer Support
AIM: hpdyno
Email: hpdyno@aol.com
Phone: 704-249-3745
Site: focus-power.com

Elder 1turbofocus
1turbofocus is offline  
    Reply With Quote Quick reply to this message
Old 03-15-2013, 05:49 PM   #39
danny42984
Focus Jr. Enthusiast
 
Join Date: Feb 2013
Fan#: 110560
Location: bristol, TN
What I Drive: 2001 maroon focus

Posts: 25
FF Reputation: 1 danny42984 Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by 1turbofocus View Post
You are correct , altho my knowledge of the SPI engine is very limited , the fuel rail psi sensor is what what tells the ecu what the fuel rail psi is , if its bad this may also be why your reader was showing low but I have never seen that

You might (Focus Zetec and SVT does) have a fuel pump driver module under the rear pass seat that sends the voltage to the fuel pump , I would also check this

Tom
Thanks for the reply! What would be the best way to check the fuel pump driver module?
danny42984 is offline  
    Reply With Quote Quick reply to this message
Old 03-15-2013, 06:45 PM   #40
1turbofocus
FF Affiliate
 
1turbofocus's Avatar
 
Join Date: Oct 2003
Fan#: 1123
Location: Belmont, NC
What I Drive: 2000 ZX3 / 2002 SVT Turbocharged

Posts: 22,357
Points 51,787, Level 100
Points: 51,787, Level: 100 Points: 51,787, Level: 100 Points: 51,787, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 32%
Activity: 32% Activity: 32% Activity: 32%
FF Reputation: 154 1turbofocus Excellent Standing Member 1turbofocus Excellent Standing Member
Buy-Sell-Trade Rating: (28)
Voltage output , to have that high of fuel psi the voltage should be 12+ volts , check the ground as it is the controlling voltage wire

Keep in mind the fuel rail psi sensor could be bad telling the pump to add more psi , one tells the other what to do

Tom
__________________
Focus-Power: Your #1 Source for Ford Focus Speed, Tuning & Performance!

Customer Support
AIM: hpdyno
Email: hpdyno@aol.com
Phone: 704-249-3745
Site: focus-power.com

Elder 1turbofocus
1turbofocus 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 04:27 PM.


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