Question about 2000 Ford Taurus

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What causes 2000 taurus engine rough idle but no codes

No DTC but idle very rough, runs great above idle. Have replaced air filter, fuel filter, spark plugs, spark plug wires. coil pack, MAF sensor, crankshaft sensor, TPS sensor, IAC and checked for vacuum leaks.

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I have a 2000 ford tauras that idles at 2000 rpm. And when i put it on drive from 20 to 40 mph the excelleration is slow and shakes the car badly. i cleaned the entire throttle body and it remains the same. Can someone help me?

Posted on Oct 14, 2013

  • Michael Van Der Burgt
    Michael Van Der Burgt Nov 04, 2013

    There is a chance you might have a head gasket going. Very very small leak. Does it run better once warmed up? Is it on wet or rainy days? Give me more details. So far it seems like you have covered most of the basics.

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Remove neg. cable from battery so the ECM will reset this may work. make sure the IAC is air tight. if this doen't fix your problem have someone check the IAC valve if it's bad the part runs $300.00 pluse

Posted on Nov 25, 2011

  • Michael Van Der Burgt
    Michael Van Der Burgt Jan 04, 2012

    Having same issue on my 1997 taurus. So far chasing a ghost. No codes. New plugs, new ect, new cam sensor, cleaned egr, cleaned throttle body with ford safe crc throttle body cleaner.(ford speacial teflon coating) It runs crappy at idle for 1-2 min then disappears. Until a cold start.

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I had a head gasket going when I have a rough idle. Just weeping coolant past the number 1 cylinder. When I pulled the head the piston was all shiny and steam cleaned. $500 dollars all good now.

Posted on Nov 04, 2013

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2000 hyundai lantra sportswagon running rough, idling rough also, when accelerating splutters/spurges. Thinking maybe spark plugs or timing belt??


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What would cause a rough idle when cold and at idle but runs great once warm


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2000. Why does it idle roughly?


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My 94 Toyota Camry 4 cyl is running really rough and stalling out once the engine warms up


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Solution:
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Obd code system to lean bank 1&2


Lean on Bank 2 means one side of the engine is getting less fuel or too much air. I also own a 4.0L and I work on these models for this code consistantly. Usually if you have a vacuum leak at the pcv valve hose behind the throttle body you will get a lean Bank 1 and 2.
My recommendation in these cases would be to change the PCV valve (helps with your gas milage) and the fuel filter; other than that you will have to be sure the fuel pressure is correct and there is no vacuum leaks on the driver side of the engine. I am 90 percent sure the fuel filter, pcv valve and clearing the codes will correct this issue.

Here I find one TSB...
MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED - SYSTEM LEAN DIAGNOSTIC TROUBLE CODES (DTC'S) - SERVICE TIPS

FORD:
2000 Contour
2000-2002 Escort
2000-2003 Escort ZX2
2000-2004 Crown Victoria, Focus, Mustang, Taurus
2002-2004 Thunderbird
2000-2003 Windstar
2000-2004 Econoline, Excursion, Expedition, Explorer, F-Super Duty, Ranger
2001-2004 Escape
2004 Freestar
2000-2004 F-Series

LINCOLN:
2000-2002 Continental
2000-2004 LS, Town Car, Navigator
2002-2003 Blackwood
2003-2004 Aviator

MERCURY:
2000 Mystique
2000-2002 Cougar
2000-2004 Grand Marquis, Sable, Mountaineer
2004 Monterey

ISSUE: This article is intended to aid in diagnosing DTC's P0171, P0174, P1130, P1131, P1150, P1151, P2195, or P2197 (system lean or lack of HEGO switches) when a vacuum leak is present. HEGO sensors, MAF sensors, and PCM replacements are not an effective repair when a vacuum leak is causing the above DTC's.

ACTION: Perform the following inspections/repairs when the above codes are found in memory. Procedure provides instructions on how to make comparisons of the total fuel corrections (using scan tool or equivalent) at idle and high RPM's to help determine if a vacuum leak is the root cause of the DTC's.

SERVICE PROCEDURE:
NOTE FREEZE FRAME AND ADAPTIVE FUEL VALUES (ASSOCIATED WITH "LONGFT" PID) WILL NOT BE AVAILABLE IF A KAM OR OBDII RESET WAS RECENTLY PERFORMED.

NOTE FREEZE FRAME DATA WILL INDICATE THE ENGINE AND AMBIENT CONDITIONS WHEN THE DTC WAS SET. THESE ARE IMPORTANT BECAUSE THE VACUUM LEAKS MAY OCCUR ONLY WITHIN SPECIFIC TEMPERATURE RANGES AND MUST BE DUPLICATED TO DETECT THE LEAK.

NOTE FUEL TRIMS AT IDLE ARE PARTICULARLY SENSITIVE TO VACUUM LEAKS SINCE THE UN-METERED AIR LEAKAGE FLOW IS A HIGHER PERCENTAGE OF TOTAL AIRFLOW AT IDLE THAN AT PART THROTTLE. THE BAROMETRIC PRESSURE (BP) PID IS NOT RECOMMENDED TO VIEW WHEN DIAGNOSING A VACUUM LEAK. BP IS AN INFERRED PID CALCULATED DURING HIGHER ENGINE LOADS.

Jan 20, 2012 | 1996 Ford Explorer

1 Answer

2000 ford taurus jerks at driving speeds, and stalls when i come to a stop can anyone give suggestions


If you run the OBD II codes,it'll give you an idea. I would suspect the usual offenders......old spark plugs,wiring,or coil pack problem.
An EGR can cause jerking and dying, but so can a vacuum leak,usually accompanied by rough idle before the engine dies.
I just did my sister-in-law's plugs,wiring, and coil pack in THAT order,because the code only showed `MISFIRE,cyl. #2.'
Even though the plugs and wiring were pretty worn,it turned out the coil pack had gone bad.
Also,how long since you replaced your fuel filter? don-ohio (:^)

Nov 21, 2011 | 2000 Ford Taurus

1 Answer

Recently I had my 2000 gmc 2500 6.0 liter truck start running rough. I changed the spark plugs, checked the coil packs and replaced the fuel pumpand fuel filter. Still no change....Any suggestions?


ROUGH IDLING CAN BE CAUSE BY MANY THINGS.I AM LOOKING AT LEAKING VACUUM HOSES OR INTAKE MANIFOLD GASKET LEAK.DIRTY FUEL INJECTORS AND WORN ENGINE VALVES WILL CAUSE ROUGH IDLING.ALSO LOW IDLE SPEED CAUSE ENGINE TO RUN ROUGH.

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