2007 ford taurus intermittent stalling and intermittent rough idle. - Page 5 - Taurus Car Club of America : Ford Taurus Forum
 30Likes
Reply
 
LinkBack Thread Tools
post #41 of 51 (permalink) Old 04-27-2019, 05:52 PM
Moderator
 
Join Date: Feb 2007
Location: Milwaukee, WI
Chapter: Midwest
Year: 2005
Model: Ford Taurus
Engine: 3.0L 24v Duratec V6
Posts: 7,659
Rep Power: 87
     
Trader Score: 0 reviews
Sounds like you are on the right track with an open circuit between the sensor connector and the PCM. I would start by tracing the harness from the 02 sensor to the PCM looking for damage, etc. Also check the harness side connector for corrosion, damage, etc. Also possible you have some weird internal issue in the PCM.
Stephen Pump likes this.

05 Taurus SEL Duratec - my daily driver
04 Taurus SES Duratec - wifes car - TOTALED
06 Taurus SE Vulcan - wifes new ride
95 Taurus GL Vulcan winter car
Toy #1 - 86 Tbird 5.0 (original owner) - LOTS of mods
Toy #2 - 88 Tbird Turbo Coupe - LOTS of mods
67 Honda 450 Super Sport - completely customized
Jeff K is online now  
Sponsored Links
Advertisement
 
post #42 of 51 (permalink) Old 04-27-2019, 09:04 PM Thread Starter
Junior Member
 
Stephen Pump's Avatar
 
Join Date: Dec 2018
Posts: 32
Rep Power: 0
 
Garage
Trader Score: 0 reviews
Smile

Quote:
Originally Posted by Jeff K View Post
Sounds like you are on the right track with an open circuit between the sensor connector and the PCM. I would start by tracing the harness from the 02 sensor to the PCM looking for damage, etc. Also check the harness side connector for corrosion, damage, etc. Also possible you have some weird internal issue in the PCM.
Thanks that pretty much just what I was thinking. On ebay I did pay I think 10 bucks for the ford technical manual, and just now having a good look at it. there is a specific set of pinpoint test I can perform to figure this out without cutting any wires till I am sure. I will attach the portion so others who use the site may help someone someday. Also note I stole the images of the pcm pins from somewhere in this forum.
Attached Thumbnails
Click image for larger version

Name:	pcm_connector1.jpg
Views:	11
Size:	166.3 KB
ID:	208585   Click image for larger version

Name:	pcm_connector2.jpg
Views:	9
Size:	174.5 KB
ID:	208587  
Attached Files
File Type: pdf o2 wiring diagram.pdf (44.4 KB, 7 views)
File Type: pdf pinpoint test o2.pdf (51.9 KB, 6 views)
sheila likes this.
Stephen Pump is offline  
post #43 of 51 (permalink) Old 04-29-2019, 06:32 PM Thread Starter
Junior Member
 
Stephen Pump's Avatar
 
Join Date: Dec 2018
Posts: 32
Rep Power: 0
 
Garage
Trader Score: 0 reviews
Noticed watching live data and having my gf jiggle the engine harness o2 sensor would start to show functioning but the car would start to stall. Stripped all the protection from the pcm down to mid motor on the motor harness. And behold, lots of chafing and obviously areas that have been worked on before. what do you think is the best wrap for some of the chafed wires? Just looking at them, some I will probably have to be replaced/soldered in.
Attached Thumbnails
Click image for larger version

Name:	IMG_20190429_192138.jpg
Views:	13
Size:	265.2 KB
ID:	208607   Click image for larger version

Name:	IMG_20190429_192132.jpg
Views:	13
Size:	116.6 KB
ID:	208609   Click image for larger version

Name:	IMG_20190429_192118.jpg
Views:	12
Size:	82.3 KB
ID:	208611   Click image for larger version

Name:	IMG_20190429_192142.jpg
Views:	14
Size:	289.6 KB
ID:	208613  

Stephen Pump is offline  
 
post #44 of 51 (permalink) Old 04-29-2019, 08:29 PM
Crazy Devoted Member
 
Join Date: Jan 2010
Location: North Canton, Ohio
Chapter: Midwest
Year: 2006
Model: Ford Taurus
Engine: 3.0L 12v Vulcan V6
Posts: 6,537
Rep Power: 65
    
Trader Score: 0 reviews
I like heat shrink tubing on wires that are going to be soldered back together. Electrical tape is next best thing but you can also use self fusing silicon tape but that gets pretty bulky. Never used it but might work well is liquid electrical tape.
Automender12345 is offline  
post #45 of 51 (permalink) Old 05-11-2019, 01:57 PM Thread Starter
Junior Member
 
Stephen Pump's Avatar
 
Join Date: Dec 2018
Posts: 32
Rep Power: 0
 
Garage
Trader Score: 0 reviews
Quote:
Originally Posted by Automender12345 View Post
I like heat shrink tubing on wires that are going to be soldered back together. Electrical tape is next best thing but you can also use self fusing silicon tape but that gets pretty bulky. Never used it but might work well is liquid electrical tape.
ended up replacing the o2 sensor signal wire to the pcm completely and resolved the issue. Now I just have to figure out why I am getting P1633: Keep Alive Power Voltage Too Low, that causing the cars idle to surge or stall. guess I am going to have to trace this one out to lol.
sheila likes this.
Stephen Pump is offline  
post #46 of 51 (permalink) Old 05-11-2019, 02:26 PM
Crazy Devoted Member
 
Join Date: Dec 2006
Chapter: Midwest
Year: 1998
Model: Mercury Sable
Engine: 3.0L 24v Duratec V6
Posts: 22,396
Rep Power: 112
     
Trader Score: 1 reviews
^ A/C working properly?
Stephen Pump likes this.
sheila is offline  
post #47 of 51 (permalink) Old 05-11-2019, 04:03 PM Thread Starter
Junior Member
 
Stephen Pump's Avatar
 
Join Date: Dec 2018
Posts: 32
Rep Power: 0
 
Garage
Trader Score: 0 reviews
I have the ac unplugged and ac relay out at the moment. fixed the issue, the pcm harness wasnt tight enough. But o2 sensor issue is back lol
Stephen Pump is offline  
post #48 of 51 (permalink) Old 05-11-2019, 04:06 PM Thread Starter
Junior Member
 
Stephen Pump's Avatar
 
Join Date: Dec 2018
Posts: 32
Rep Power: 0
 
Garage
Trader Score: 0 reviews

I am beginning to wonder if it is the pcm itself. From the video you can clearly see the voltage from the o2 sensor at the pcm but on my live data nothing. Not sure if it is making a good connection and for obvious reasons I dont wanna buy a pcm just to see if thats the issue. Further suggestions? Note the butt connections are temporary, I have a brand new wire on its way.

Last edited by Stephen Pump; 05-11-2019 at 04:09 PM.
Stephen Pump is offline  
post #49 of 51 (permalink) Old 05-11-2019, 08:09 PM Thread Starter
Junior Member
 
Stephen Pump's Avatar
 
Join Date: Dec 2018
Posts: 32
Rep Power: 0
 
Garage
Trader Score: 0 reviews
Talking Figured it out

somehow the plug connector isnt making a good connection with the o2 sensor. I straight pinned the power/ground to the o2 sensor and started the car, o2 is working correctly that way. So this might be sorted tomorrow. Thanks for the tips.
Attached Thumbnails
Click image for larger version

Name:	IMG_20190511_203439.jpg
Views:	15
Size:	117.1 KB
ID:	208707  
sheila likes this.
Stephen Pump is offline  
post #50 of 51 (permalink) Old 05-20-2019, 04:52 PM Thread Starter
Junior Member
 
Stephen Pump's Avatar
 
Join Date: Dec 2018
Posts: 32
Rep Power: 0
 
Garage
Trader Score: 0 reviews
SO now, I have no codes to target. No vacuum leaks I can see or hear. Th car has brand new spark plugs, coil pack, fuel filter, and new MAF. Cleaned IAC abit ago, but did note small amount of oil in it. Also, trottle body is sparkling clean. Idles like total crap until the car reaches full temperature, then runs without much issue, engine still a little jumpy at that point. I have not took it to a mechanic primarily because I am doing the work on self on free time and I have a working vehicle. Any great ideas, cause I am getting to a point where I am at a loss?
Stephen Pump 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










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Rough, pulsing idle. intermittent low RPMs and stallin ashcraft Maintenance and Repair 19 06-09-2017 07:09 PM
Rough idle on cold start barryb Maintenance and Repair 6 12-04-2016 07:39 PM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

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