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Most likely a faulty EGR or throttle position sensor Answer Checked all vacuum lines for leaks (telltale hisssssing sounds) - no problems.
Turns out to be IAC (Idle Air Control) valve , quick fix, running good
I have had the same problem with my 97 Sable 24 valve for a couple years. I can roll through town without my foot on the gas. I put in N and the tach goes up to around 2200 as long as I'm rolling. When I come to a stop it comes down to normal idle. Consequently I have gone through about three sets of front rotors.
Last year they diagnosed it as a throttle position sensor to no avail. A couple days ago a mechanic said it might be the transmission range sensor, which is the new fangled name for neutral safety switch. I have the 11 pin so alot of information goes through that switch.
He may be right but I hate to spend over 100 bucks for the part if it doesn't correct the problem. Also this problem seems to be absent in colder weather. It just started happening again when it got above 30 degrees. Was fine all winter.
First off, thanks to the individual who posted the high idle condition/transmission shift problems on the DOHC duratec engine for Taurus/Sable and the fix being the replacement of the idle air control valve.I feel compelled to post also because I got good information that was free from someone willing to take the time and effort to post and one good turn deserves another.My experience on my 1999 Sable was very similar. My 99 Sable has the 24 valve DOHC engine, AX4N transaxle and I bought it used in 2000 with 23k miles on it. It currently has 398k miles on it. I do a lot of driving in my line of work. I'm a lawyer--have briefcase will travel.At any rate, this past May my Sable developed an erratic shift condition which only occurred after driving the vehicle 20 minutes or so after it got warmed up fully. The transmission would shift rough between first and second gears, or it would skip 2nd gear altogether and shift from 1st to 3rd and would only drop into 3rd if I took my foot off the gas. Initially there was no problem with the idle. I took it to the most reputable trans shop in the area. They kept the car for 4 days and could not fix the problem so I wasn't charged anything. I was advised that the problem was not internal to the trans. The trans shop put in a new vehicle speed sensor which did not fix the problem. I am grateful to the trans shop for not charging me and being honest and giving me a free VSS. Trans shop advised PCM was signaling proper shift points and shift solenoids were all doing their jobs properly. Yay for no charge, boo for the problem not being fixed.I then took my car to AAMCO for a trans diagnosis. Paid $50 for a diagnostic and was advised trans needed to be yanked out of vehicle and problems were internal to the tune of lots of cash. I walked out of there as fast as I could.I continued to drive the car with the erratic shift problem. Over time, the idle for the car begain to creep up also. I decided to blow some Seafom through the air intake which improved things but did not totally fix the problem. I then thoroughly cleaned the throttle body/throttle plate which improved things more but still did not totally fix the problem. I then found the above referenced post regarding replacing the idle air control valve. I didn't want to take the chance on getting a bad one from a junkyard so I coughed up $170.00 and paid off the local Ford dealer for a new one. Easy access, two bolts, one electrical connector, and gasket. Since replacing the IAC all shift problems and idle problems have vanished. Finally, money well spent on a part purchased from the dealer. I'm a happy gut until the next problem with my 99 Sable shows up. It runs like new...for now.
Another experience... My 98 Had the same intermittent high idle - could drive down the road at times without touching the gas pedal.
TPS trouble code was read so I replaced it - code came right back. Not a happy camper when that happened.
Shortening up the story quite a bit and what appeared to be the fix: a thorough cleaning of the throttle body - used an OLD toothbrush to especially get in and around the throttle plate.
Gather together: A big can of spray throttle body cleaner (Berrys B12 is what I used - and NOT carburetor cleaner), toothbrush, 5/16ths nut-driver to get the air duct off the throttle body. 20 minutes for the scrubbing should about do it.
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Why is the Heater stuck on high temp on a 2001 mercury sable?
This sounds like a temperature blend door problem - with the door stuck in the heat position. See "Related Questions" below for information on Taurus/Sable blend door actuator motors and blend doors
What would cause my heater and fan to malfunction on a 96 ford Taurus?
"Malfunction" is not very specific as these components can malfunction in a variety of ways.Blower motor not work at allBlows on high speed onlyTemperature cannot be adjusted...just to name a few.See "Related Questions" below for extensive coverage of these and many other common problems with Taurus/Sable heating problems.
How do you fix the heater in Mercury Sable - Ford Taurus?
No one knows if:The heater is NOT blowing - or blowing on high speed only, or... The heater IS blowing, but the air is NOT hotEither way, the "Related Questions" below will get you started
I just bought a 2003 Ford Taurus at an auction that idles very high. What causes this?
ck for vacuum leak at the pcv valve hose
What would cause high gas consumption on a 1993 3.8 liter Taurus?
It is very possible that you have a clogged catalytic converter.
What is the temperature on Taurus mountains?
It is mostly cold or sometime even warm it depends on how high you are in the Taurus mountains
When is it time to replace brakes on a Taurus - Sable?
Brake pads have a wear indicator device built-in - causes a light weight piece of metal to hit the rotor when the pads are worn to a certain point, which makes a high pitched screechy type sound.Most people don't notice it, and end up going until the pad is completely gone and the brakes then are metal-on-metal grinding - now that they notice.See "Related Questions" below for more
Is the Taurus sho a interference engine?
No, unless you have the really high lift, aftermarket camshafts (you would know if you did) the 3.0 and 3.2 SHO are non interference engines.
Why would the daytime running lights on a 97 Ford Taurus - Mercury Sable stay on?
AnswerI own a 1997 Ford Taurus and the same thing happened to me. The best answer that I received so far is that the module just went capoot (shorted, burned out, whatever). The default status for the module is "Steady On, High Beam". The quoted cost for the replacement part for me was $166.93 and the part had to be ordered. Not wanting to invest that amount of money yet, I pulled out the fuse (located under the hood) during the day and plugged it back in at night. I later found that I could leave the fuse out and just turn on my high beam when I drive at night (result is the same being that the default is "High Beam"). (I have to be inconsiderate for my short 2 mile drive and it's not every night). There are some postings out there explaining how to bypass the module. It appears that in some places it is illegal to do so. There is an increasing amount of consumers that see this module as an unnecessary expense forced on us. I don't know if you were expecting a technical answer to your question or not. Capoot is as technical as I can get. Good Luck!LinksI found a couple of Taurus Car Club topics specific to the Daytime Running Light (DRL) modules. See "Related Links" below for moreThis is a great resource for all things Taurus/Sable!
What does the heater resistor blower effect on a 99 mercury sable?
A bad heater blower motor resistor would effect one or more blower speeds other than high.
What has venom that causes paralysis nausea and death?
That would be a cobra. Its venom is poisonous and causes death in a high number of living things it bites.
Why would a 96 Taurus wagon heater only blow when running at high RPMs and cool down when idling?
it has a partially clogged heater core.replace the heater core
