Rough idle - Taurus Car Club of America : Ford Taurus Forum
Register Home Forums Active Topics Topic Finder Photos Members List Search Today's Posts Mark Forums Read Auto EscrowAuto Loans
TaurusClub.com is the premier Ford Taurus Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 10-03-2010, 01:34 PM   #1 (permalink)
Junior Member
 
Member Number: 12666
Join Date: Jun 2007
Location: Columbus, OH
Drives: 2004 Taurus Wagon SEL
Visit: My Garage
Posts: 25
Trader Score: 0 reviews
Rep Power: 0
crossman3 has a little shameless behaviour in the past
Default Rough idle

I noticed my 2006 3.0 Taurus has a fluctuating idle while waiting at stop lights. At night, I can see the headlights flicker. Any ideas?
crossman3 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-04-2010, 08:57 PM   #2 (permalink)
Member
 
Member Number: 16451
Join Date: Aug 2008
Visit: My Garage
Posts: 320
Trader Score: 0 reviews
Rep Power: 13
james27613 is an unknown quantity at this point
Default

Have the plugs been replaced?

You may have a poor ground connection,
the flicker lights is one symptom.

Check the battery terminals for corrosion.
Easy to remove the cable clamps and clean the
terminals with inexpensive tool.

Is the Check Engine indicator on?
james27613 is offline   Reply With Quote
Old 10-05-2010, 09:51 PM   #3 (permalink)
Member
 
Member Number: 26015
Join Date: Jan 2010
Visit: My Garage
Posts: 152
Trader Score: 0 reviews
Rep Power: 0
kbcnick has a little shameless behaviour in the past
Default

i think the flickering lights is just because of the rough idle, could be getting too low of an idle and makes the alt not charge as much and makes the lights dim.
kbcnick is offline   Reply With Quote
Old 10-06-2010, 02:39 PM   #4 (permalink)
Junior Member
 
Member Number: 31738
Join Date: Oct 2010
Chapter: Northeast
Drives: 2006 SE 102k 3.0 2v
Visit: My Garage
Posts: 2
Trader Score: 0 reviews
Rep Power: 0
tomjoad39 is an unknown quantity at this point
Default

Be sure to check for DTC's and also check your alternators voltage and amp output.
If your idle speed is ok, but the headlights are flickering (you can notice it on the back of the vehicle in front of you at night), chances are good that you either have a ground/connection/battery issue, or that your alternator is bad. I had the same issue, and a new alternator solved the problem. I suggest one from a Ford dealer.
tomjoad39 is offline   Reply With Quote
Old 10-06-2010, 04:22 PM   #5 (permalink)
Junior Member
 
Member Number: 30382
Join Date: Jul 2010
Chapter: Northeast
Drives: 2002 Ford Taurus SES 3.0 Duratec
Visit: My Garage
Posts: 9
Trader Score: 0 reviews
Rep Power: 0
Snider519 is an unknown quantity at this point
Default

How big is the fluctuation? My car fluctuates maybe 100 rpm when just sitting idling, it needs one of the o2 sensors replaced..
Snider519 is offline   Reply With Quote
Old 10-07-2010, 10:24 AM   #6 (permalink)
Technical Advisor
 
Member Number: 11378
Join Date: Feb 2007
Location: Milwaukee, WI
Visit: My Garage
Posts: 4,955
Trader Score: 0 reviews
Rep Power: 62
Jeff K has a reputation beyond reputeJeff K has a reputation beyond reputeJeff K has a reputation beyond reputeJeff K has a reputation beyond repute
Default

Check for a vac leak around the gasket for the intake runner control valve gasket.
__________________
05 Taurus SEL Duratec - my daily driver
04 Taurus SES Duratec - wifes car
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
02 Pontiac Grand Prix GT
67 Honda 450 Super Sport - completely customized
Jeff K is offline   Reply With Quote
Old 10-07-2010, 10:35 AM   #7 (permalink)
Crazy Devoted Member
 
Member Number: 10865
Join Date: Dec 2006
Visit: My Garage
Posts: 12,617
Trader Score: 1 reviews
Rep Power: 53
sheila is a glorious beacon of lightsheila is a glorious beacon of light
Default

^+1
sheila is online now   Reply With Quote
Old 10-07-2010, 01:33 PM   #8 (permalink)
Crazy Devoted Member
 
Member Number: 4817
Join Date: Feb 2005
Location: Irvine, California
Chapter: Northeast
Drives: 1992 Taurus SHO
Visit: My Garage
Posts: 5,520
Trader Score: 0 reviews
Rep Power: 32
loudsho92 has a spectacular aura about
Send a message via AIM to loudsho92 Send a message via Yahoo to loudsho92
Cool

The IAT sensor might be bad.
__________________
92 White SHO

-Performance: Turbo 297hp 279ftlb
-Drivetrain: CM Clutch,SHONut Mounts,QUAIFE
-Suspension: SS Coilovers, 24/26mm,Poly,Gen3,H-Brace, Subframe
-Brakes: Cobra front, 11.6 rear
-Looks: Sound System,Speedhut,Pilot Fogs,Clear Corners,Gen2 Console, CF Cowl Hood & Trunk
http://www.shosource.com
loudsho92 is offline   Reply With Quote
Old 11-05-2010, 09:53 PM   #9 (permalink)
Junior Member
 
Member Number: 32274
Join Date: Nov 2010
Location: Anchorage, Alaska
Chapter: Pacific Northwest
Drives: 2006 ford taurus. 3.0v6 SE
Visit: My Garage
Posts: 21
Trader Score: 0 reviews
Rep Power: 0
newtrawn is an unknown quantity at this point
Default

I have exact same problem. I have replaced the Mass Airflow sensor, alternator, plugs, wires, idle air valve, coil pack and it still persists. I can't tell if the lights are dimming because the engine is dropping below 700 rpm or an intermittent electrical draw is putting additional load on the engine at idle (like when you switch the rear defrost on, or the heater motor) causing it to have to compensate..


The flickering coincides with the rough idle.. (when there is no flickering, idle is smooth) It is also completely ransom.. Like it will flicker 20 times in 10 seconds or will flicker 1 time in a minute. It seems like something is putting additional load on my engine through the alternator (grounding out)..

I have spent hours and hours on this problem, as well as many hundreds of dollars. Can someone PLEASE help?
newtrawn is offline   Reply With Quote
Old 11-05-2010, 11:10 PM   #10 (permalink)
Devoted Member
 
austex04's Avatar
 
Member Number: 17509
Join Date: Dec 2008
Location: Austin Tx
Visit: My Garage
Posts: 1,392
Trader Score: 0 reviews
Rep Power: 14
austex04 is an unknown quantity at this point
Default

Quote:
Originally Posted by newtrawn View Post
I have exact same problem. I have replaced the Mass Airflow sensor, alternator, plugs, wires, idle air valve, coil pack and it still persists. I can't tell if the lights are dimming because the engine is dropping below 700 rpm or an intermittent electrical draw is putting additional load on the engine at idle (like when you switch the rear defrost on, or the heater motor) causing it to have to compensate..


The flickering coincides with the rough idle.. (when there is no flickering, idle is smooth) It is also completely ransom.. Like it will flicker 20 times in 10 seconds or will flicker 1 time in a minute. It seems like something is putting additional load on my engine through the alternator (grounding out)..

I have spent hours and hours on this problem, as well as many hundreds of dollars. Can someone PLEASE help?
I've been living with this problem since I bought mine in '07, 2 dealers said they couldn't find anything wrong with mine, soon after I bought it. I test drove 3 other Vulcan Taurus, from the same year, and they all did the same thing mine does. I guess most of them do this, even I can't find anything wrong with mine, and I have a code scanner with live data, no codes, nothing to suggest vac leaks, or bad sensors. On some days, mine will idle as smooth as a Honda, on others, the idle is as unstable as a tweaker on ice. New plugs and wires at 96k didn't do anything.
austex04 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools

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



All times are GMT -5. The time now is 11:46 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2