2003 SES OHC "U" total loss of power - Page 3 - Taurus Car Club of America : Ford Taurus Forum
Reply
 
LinkBack Thread Tools
post #21 of 53 (permalink) Old 01-14-2013, 10:32 AM Thread Starter
Junior Member
 
Join Date: Oct 2010
Chapter: Northeast
Posts: 24
Rep Power: 0
 
Trader Score: 0 reviews
The entire exhaust system has been replaced from engine manifolds all the way out.
I'll confirm pressure at the EGR pipe tonight with a gauge attached directly.

Was trying to surf other threads for anything similar.
Can any other sensor cause this issue?
SES Dad is offline  
Sponsored Links
Advertisement
 
post #22 of 53 (permalink) Old 01-14-2013, 10:39 AM
Technical Advisor
 
behlinla's Avatar
 
Join Date: Dec 2007
Location: Wisconsin
Chapter: Midwest
Posts: 7,539
Rep Power: 84
      
Trader Score: 0 reviews
Quote:
Originally Posted by SES Dad View Post
Can any other sensor cause this issue?
Nope. The exhaust should be able to handle whatever the engine can put out.

When you do the test, remember to unplug the EVR or EGR vacuum line so the EGR valve won't open (you can see this in the video).
behlinla is offline  
post #23 of 53 (permalink) Old 01-14-2013, 10:47 AM Thread Starter
Junior Member
 
Join Date: Oct 2010
Chapter: Northeast
Posts: 24
Rep Power: 0
 
Trader Score: 0 reviews
behlinla,
Thanks for staying with this one. I see you just picked up another EGR issue on the '07. The lean code P0171 is the only one that I had received.

This is really driving me nuts. I seem to have plenty of exhaust at the muffler now.
But still major hesitation and no power, especially after it warms up.
I'm gonna see if my exhaust guy will at least offer to drop the 'Y' pipe down and double check. I don't think I can do it on my back in the garage.
Rich
SES Dad is offline  
post #24 of 53 (permalink) Old 01-14-2013, 01:06 PM
Sam
breeves002

 
Sam's Avatar
 
Join Date: Sep 2012
Location: St. Louis, MO
Chapter: Midwest
Year: 2008
Model: Mercury Sable
Engine: 3.5L Ti-VCT V6
Posts: 6,574
Rep Power: 94
       
Garage
Trader Score: 8 reviews
So you have a P0171 code? I'm confused.

P.S. with the EVR plugged in, the EGR should be closed at idle.

No other codes? No misfire? No flashing CEL? The hesitation could be part of that code, but you still must have something restricting the exhaust somewhere.


Sent from my iPhone using AutoGuide.com App

Sam

2008 Mercury Sable Premier
2014 Ford Focus Electric
1997 Mercury Grand Marquis GS
Moved On: 2000 Sable LS Premium Duratec
Sam is offline  
post #25 of 53 (permalink) Old 01-14-2013, 01:18 PM Thread Starter
Junior Member
 
Join Date: Oct 2010
Chapter: Northeast
Posts: 24
Rep Power: 0
 
Trader Score: 0 reviews
Sam,
Yep...the only code I originally had was P0171....for a long time I believe.
Gonna try to request my guy to pull the exhaust down for me just to 'double-check' everything. He assures me it is right, but....
I agree, based on the tube and flow, only an exhaust restriction should be causing this pressure at the upstream side of the EGR tube.
I'll report back later tonight with actual pressure value at the tube.
Rich
SES Dad is offline  
post #26 of 53 (permalink) Old 01-14-2013, 07:24 PM Thread Starter
Junior Member
 
Join Date: Oct 2010
Chapter: Northeast
Posts: 24
Rep Power: 0
 
Trader Score: 0 reviews
Rigged up a pressure gage at the upstream EGR tube nipple. Based on an exhaust back pressure video I saw, I would say that I DO NOT have a clogged exhaust. No recordable pressure at idle and only slight (under 2 psi) pressure showing at about 3000 rpm.
So where does that put me?
Let's review where we came from:
1. Car exhibited extreme loss of power (worse after getting warm)
2. Blew off DPFE hoses trying to drive it home
3. Confirmed only P0171 code (lean bank 1) suspect that was on for years
4. Replaced all cats and muffler
5. Replaced plugs and wires
6. Replaced fuel filter
Car still exhibits low power and potential miss. Will get a code reader to determine any new codes set or pending.
Things to do:
Confirm EGR function tomorrow (borrowing a vacuum pump)
Confirm EVR solenoid function
Verify no vacuum leaks at small EGR and EVR tubes

Could this be a bad coil pack? How to tell?

Thanks in advance for the help....I think we are getting there Sherlock
SES Dad is offline  
post #27 of 53 (permalink) Old 01-14-2013, 07:41 PM
Sam
breeves002

 
Sam's Avatar
 
Join Date: Sep 2012
Location: St. Louis, MO
Chapter: Midwest
Year: 2008
Model: Mercury Sable
Engine: 3.5L Ti-VCT V6
Posts: 6,574
Rep Power: 94
       
Garage
Trader Score: 8 reviews
You can confirm the EGR function by popping the cap off of the EVR and then putting your finger on the nipple. Or just use a piece of vacuum line and suck on it on top of the EGR valve. If the motor runs VERY rough or stalls, you have proper EGR function (not stuck open or closed).

Put the DPFE hoses back on... Make sure they are on all the way and snug. See if they blow off again. Maybe they were not put back on correctly?

If there is no significant pressure at idle and under 2psi at 3k rpm you shouldn't have a backflow problem. Seems pretty unrestricted to me assuming you did the test right.

Sam

2008 Mercury Sable Premier
2014 Ford Focus Electric
1997 Mercury Grand Marquis GS
Moved On: 2000 Sable LS Premium Duratec
Sam is offline  
post #28 of 53 (permalink) Old 01-14-2013, 07:43 PM Thread Starter
Junior Member
 
Join Date: Oct 2010
Chapter: Northeast
Posts: 24
Rep Power: 0
 
Trader Score: 0 reviews
May have just stumbled upon the solution.
After reading a couple recent posts (Northern) decided to do the cylinder drop test as posted in the misfire diagnosis sticky by Breeves002....
I'm sure the car won't run properly if both 2 and 3 cylinders are not firing.
Thanks for the work Sam.
SES Dad is offline  
post #29 of 53 (permalink) Old 01-14-2013, 07:47 PM
Sam
breeves002

 
Sam's Avatar
 
Join Date: Sep 2012
Location: St. Louis, MO
Chapter: Midwest
Year: 2008
Model: Mercury Sable
Engine: 3.5L Ti-VCT V6
Posts: 6,574
Rep Power: 94
       
Garage
Trader Score: 8 reviews
Hey! There we go! I'm curious why you don't have a misfire code for cylinders 2 and 3. Replace the coil pack!

It's a no wonder that your cats were destroyed!!


Sent from my iPhone using AutoGuide.com App

Sam

2008 Mercury Sable Premier
2014 Ford Focus Electric
1997 Mercury Grand Marquis GS
Moved On: 2000 Sable LS Premium Duratec
Sam is offline  
post #30 of 53 (permalink) Old 01-14-2013, 08:01 PM Thread Starter
Junior Member
 
Join Date: Oct 2010
Chapter: Northeast
Posts: 24
Rep Power: 0
 
Trader Score: 0 reviews
Hmmmm....true. I too would think those codes would have shown.
Still not sure I don't have a clogged intake due to running lean for so long.
We'll replace the coil pack an see how it works then.
Stay tuned please.
SES Dad is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Taurus Car Club of America : Ford Taurus 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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome