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2004 Lincoln ls rough idle when first started

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 3 Answers

SOURCE: which ignition coil is bad?

I went thru this on my 2002 LS as well.
I replaced one ignition coil at the dealer - only to get the same misfire code on another cylinder. After a little research found out is actuall a gasket/o-ring problem design of the block. Spark plugs are deep in the block - under the oil - which is why they are supposed to last 100,000 miles. But the o-rings start to leak some where between 65k-85k miles. Coils go bad because of oil contamination. If you don't solve leaking oil problem will have to replace coils again - but sooner - because leaking oil will be progressively worse.
Cost - 8 ignition coils
set of spark plugs (who knew they were that expensive
and a ton of cash for the labor to tear down the top of the motor

Posted on Dec 14, 2008

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Anonymous

  • 65 Answers

SOURCE: idling rough. The coils and spark plugs have been

id clean the throttle body before spending more money on anything else, as carbon build up can cause rough idling.
you can clean it with throttle body cleaner, or just gasoline and a toothbrush, then wipe off the build up.

Posted on Jun 29, 2009

Anonymous

  • 9 Answers

SOURCE: 2001 LINCOLN LS V6 - ROUGH IDLE / SOMETIMES STALLING.

Very common problem is about a dime size hole wearing in the rubber elbow on the PCV valve located on the driver side rear of the intake manifold.

Posted on Oct 13, 2009

Anonymous

SOURCE: 2004 lincoln ls has p0420 code c ev o oh e

If you have a 2004 lincoln ls,the PO420 is-- Catalyst System Efficiency Below Threshold. ( Bank 1) The list of possible causes are long. I have the same vehicle, and the Emissions Manual,which is several hundred dollars. Don't let anyone tell you it is a bad Converter. It may be, but it is only six years old. I would check for codes. The ignition coils (Coil-On-Plug) go bad on all Fords and a misfire, resulting overheating of exhaust system etc,will set all kinds of codes,and they may not be related, to the real issues. Lincoln is where one of everything goes,when it comes to the latest technology. Check that the O2 Sensors are screwed in tight. Later on you may need to have them checked out,if no ignition issues or malfunctioning coolant temp sensor issues. Use only 5-20 Oil. I use Mobil 1 synthetic. Hopefully your not using any,and ruining the converter. Make sure you have the system full of coolant,including the Degas container,the one where antifreeze mix goes. Remember GO5 Yellow antifreeze on ford products. Also bleed the hose next to the brake booster to let out air,in the coolant system. You can check for above normal fuel pressure. I would not go to a Dealer and spend more than necessary. Find a good shop that knows these vehicles. You can't fix every problem on all makes that come thru your doors today. Hope I give you a start on things to have checked. I would stand in the service bay by the car and have the tech prove what is wrong before I would authorize any part replacement.

Posted on Apr 07, 2010

RabidWolf

  • 1 Answer

SOURCE: what does srvc (p) mean on a 2004 lincoln ls?

Means your parking break is confused (it's electronic).
This can happen if you unhook/rehook the battery.

How to fix: while engine is running and car is in park, turn parking break on, then off. Repeat. It should now be fixed.

Posted on Jul 10, 2010

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1 Answer

Lincoln ls cold start idles rough in the morning


Do you have a block heater? You can have on installed if not, then plug your car in over night. You car will run much smoother in cold weather.

Nov 06, 2013 | 2004 Lincoln LS

1 Answer

Car runs great but on a cold start it has a rough idle like a bad plug or fuel filter replaced both after car is warn will start fine every time


has the engine coolant temperature sensor been checked to see that it has the correct ouput votage at the chart temps, if it is out of spec the engine can run lean and this would cause cold start issues, also what is the fuel pressure reading when key is shut off, does it drop rapidly? should never loose more than 5 PSI, if it does the fuel pump is defective, also a fuel filter will not cause hard start or rough idle, only overall loose of power, does it have that at anytime?

Oct 27, 2010 | 2004 Lincoln LS

1 Answer

My 03 Lincoln LS started idling rough only in the mornings when first started. Rest of the day it starts and runs smooth.


Sounds like it might be leaking intake manifold gaskets. They leak when cold but as the engine warms up they swell and seal up. This is common with rubber intake manifold gaskets.

Oct 07, 2010 | 2001 Lincoln LS

2 Answers

My 2004 ls lincoln 2004 ls is rough sometimes only whe idling and no codes are showing. It have 35k miles. The fuel filter is new.


The air filter should be changed frequently. The Lincolns have longer warranties than most cars.
You might want to go to a dealer and see if you still have warranty left.
Some parts will cause idle problems and not set off the Codes. You may need the idle adjusted. Your car may need the EGR passages cleaned under the airhorn. Sometimes on all cars the O2 sensors operate within approved range, but when 2 of them are combined they work against each other.

A dealer can run a diagnostic for spark and fuel pressure to insure peak performance.

Oct 13, 2009 | 2002 Lincoln LS

2 Answers

2001 LINCOLN LS V6 - ROUGH IDLE / SOMETIMES STALLING.


Very common problem is about a dime size hole wearing in the rubber elbow on the PCV valve located on the driver side rear of the intake manifold.

Sep 26, 2009 | 2001 Lincoln LS

1 Answer

Idling rough. The coils and spark plugs have been replaced but still idles really bad in my 2001 Lincoln LS. The car has 72000 miles


id clean the throttle body before spending more money on anything else, as carbon build up can cause rough idling.
you can clean it with throttle body cleaner, or just gasoline and a toothbrush, then wipe off the build up.

Jun 29, 2009 | 2001 Lincoln LS

1 Answer

2000 lincoln ls replaced coils car idles rough now it wont start


I would take it to someone with an obd tester and see what codes they pull.

Is a check engine light on?

Who replaced the two coils and did they use genuine Lincoln Parts?
You can open up a whole new can of worms using some types of aftermarket coils.
These cars have tons of electronics in them and some aftermarket coils don't mesh well with the original electronics causing other electrical anomalies.

Let me know how it goes,
AadoubleA

Mar 24, 2009 | 2000 Lincoln LS

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