Rough idle at start up

Tiny
RAY HERBERT
  • MEMBER
  • 2001 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
Causes of rough idling during cold starts. AFter warning up, idle smooths out. Possibly some loss of power while driving. Seems as if not running on all cylinders at start up. After warmup, idles fine. Replaced plugs and wires. Recently replaced coil, around 2 years ago. Current mileage 140,000.
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Wednesday, April 27th, 2011 AT 12:56 PM

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Tiny
RASMATAZ
  • MEMBER
Here's a guide to read, it may help you figure it out

http://www.2carpros.com/articles/engine-misfires-or-runs-rough

Sounds like it could be an injector bleeding down over night, or even a very minor issue with ahead gasket putting water in the cylinder overnight.

Definitely start basic.. be sure the tune up is good, they run rich when cold and border line wires/plugs can misfire in this condition.

Do you notice any coolant loss?

You should scan for codes even if there is no check engine light... you can look at misfire history to see what cylinder it is and go from there

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Wednesday, April 27th, 2011 AT 1:36 PM
Tiny
ANTIGAS
  • MEMBER
These cars are notorious for developing a leak in the pcv hose at the intake and cause rough idle even stalling. When the hose gets warm from the motor running the hose softens enough to stop the leak slightly and then runs fine. Check this hose right at the intake and see if there is cracks or small rip at the elbow of the hose
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+1
Wednesday, May 4th, 2011 AT 11:15 PM
Tiny
UVAEMS
  • MEMBER
  • 2001 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 18,000 MILES
Hi, I hope you can help, I am stumped. Used fuel tank recently installed, now have to trickle fuel in. Was told the check valve was plugged, garage said they blew it out, but still can't add fuel to tank without clicking off 1000 times.
Rough idle under load. Runs fine at highway speeds, no hesitations, no misses, plenty of power, but pull up to stop sign and feels like its about to stall. I replaced plugs, wires, coil pack, fuel and air filter. Pulled fron injectors, and cleaned them. Compression test on front 3 cylinders #4 125 #5 150 #6 160. Oil level normal not milky, anti freeze level normal. Don't hear any vacuum leaks. Car sat for 4-5 months. Could it just be junk from the used tank? I've tried running techron in the tank, and added 1/2 quart marvel mystery oil to help clean top side. Any thoughts would be greatly appreciated
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
ZACKMAN
  • MEMBER
Check your EGR valve and EVAP solenoid
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
UVAEMS
  • MEMBER
The egr valve appears to be working. The scanner only threw a code for the fuel gauge sending unit (which also isn't working). Is the evap solenoid under the trunk having to do with vapors from tank?

Thanks
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
ZACKMAN
  • MEMBER
Yes it does. It is responsible for purging the vapor in the system to be burned while the engine is running. If the system is full of fuel vapor (fumes) - the tank has high pressure and no more fuel can enter. Have the solenoid checked out.
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
UVAEMS
  • MEMBER
Will do thank you. Would a bad evap solonoid also cause a rough idle?
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
ZACKMAN
  • MEMBER
Yes it will, but not as much as bad EGR will cause.
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
MJDARIN
  • MEMBER
  • 2001 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
The engine idles rough and the exhaust is rich with gas. As soon as you hit the accelerator, the problem clears up and the gas milage is the same. As of now, no problem codes have popped up and the "Service Engine Light" has not come on. The engine bounces between 500 and a 1000 rpms. Starts with no problems. I am not sure if its my imagination or not, but it seems that if your going 55 MPH down the road and you let off the accelerator, the engine doesn't slow down until you hit the brakes. What's your thoughts?
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
MERLIN2021
  • EXPERT
May be the idle air control. Mounted on the side of the throttlebody, remove and clean the carbon out. Or replace it. Also you may have a vacuum leak, get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
GALAHAD412
  • MEMBER
  • 2001 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 169,000 MILES
Hi. This car suddenly has no power climbing hills, and shifts down to lower gears to keep going. Plugs look ok, were cleaned and regapped and replaced. Checked and topped all fluids, added octane booster and filled up w/ hightest gas. No obvious sound for compression leak. Several months ago I replaced the plugs as the three on the front of the transverse engine had the anodes burned clear off while the rear plugs were fouled and hardlly used. I also replaced the voltage distributor pack? Mounted on the block, which fixed thihngs for five months. No water iin the oil. Car starts ok, but idles and runs roughly. Plug wires look ok. High pitched sound low passenger side may be a failing water pump, but no leaks seen. Any ideas! Pw
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
Check the ignition timing/fuel pressure/exhaust for restriction and also the TPS/MAF/MAP sensors-
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
MARYANN.HAHN
  • MEMBER
  • 2001 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 86,759 MILES
Was driving slowly through residential area, car started acting like it wanted to stall. After increasing speed it stopped doing that. Next day engine light came on and it occassionally will idle roughly when sitting at a stop light or driving very slowly. I am a single woman and don't want to get jerked around at the dealership so can you give me an idea of what could be wrong before I go in there? How do you check codes in a car? There use to be a way on turning the ignition three times and a light would flash several times for whatever code was wrong.
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
MASTERTECHTIM
  • MEMBER
Take your car to autozone and have them scan the car for codes. They do it for free. Get back to us with the codes. You most likely just need a tune up. If you get a code po 300-306 then for sure you need a tune up. Get back to us
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
MARYANN.HAHN
  • MEMBER
I went to Auto Zone and they hooked up a small device and told me my car was running "lean" I tried to question the young man but he told me it could be several different sensors and that I should take it to the shop. I asked if it could mean it needs a tune up and he said it could but I shouldn't try anything until I took it to the shop and got official codes.
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
MASTERTECHTIM
  • MEMBER
Ok this is probably going to be alot easier that a tune up. These engines get vacuum leaks and run lean because the pcv valve vacuum hose gets deteriorated and leaks causing your symptom. This is a very easy and inexpensive repair.
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
MARYANN.HAHN
  • MEMBER
YOU ARE AWESOME! We looked at the PCV hose and found cracks in the elbow. Once that was fixed all was good. Thank-you so much. This could have easily caused me money I didn't have if I had to take it to the dealer. Thank-you again!
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
IRCMATE
  • MEMBER
I am having the same issue as this lady but I cannot find any place to purchase the rubber hose or the 90 degree rubber hose part. Can someone please direct me to a place online?

Thanks.
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
LEENJ
  • MEMBER
  • 2002 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 90,000 MILES
2002 Taurus engine runs rough at idle for first 30 seconds and then smoothes out. Using scan tool the only thing unusual is the ignition advance is only 2 to 3 degrees and then moves up to 10 to 12 degrees as engine smoothes out. What things control the timing?
Thanks. Lee
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)
Tiny
MASTERTECHTIM
  • MEMBER
Go to any parts store and purchase 1 foor of 3/8 rubber fuel line and make a real wide bend. Who cares if it looks goofy, it will work.
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Thursday, November 29th, 2018 AT 7:27 PM (Merged)

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