Question about 2000 Lincoln LS

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Engine light stays on,very rough idle like the car is missing,and no power off the line.Feels like clogged injectors,but only use 93 octane,and injector cleaners regularly.Smell burnt carbon from back of car after hard acceleration.Any ideas??-Dave.

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WELL COULD BE CLOGGED FUEL FILTER.SCAN CAR COULD BE EGR VALVE OR FAULTY FUEL PRESSURE REGULATOR.

Posted on Aug 05, 2010

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I had the same problem. It was the gas make sure its 93 octane and from a good gas station if not your lite will stay on..try it it worked for me

Posted on Sep 15, 2010

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Posted on Jan 02, 2017

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Rough idle in drive, correct rpm


Car idle is rough Inspection Service & Cost A rough idling engine can be caused by a number of issues, some of them are serious while others tend to be minor, but the symptoms remain pretty much the same. The car will feel rough and bouncy when the engine is running. The car will also idle below its regular speed, display inconsistent RPMs and may produce a shaking, skipping or slipping sound when the vehicle is running.
While a rough idling engine may seem to be a simple inconvenience it often indicates a deeper problem within the engine. The vehicle should be inspected and repaired as soon as possible because small problems have a way of turning into expensive repairs. How this system works: The idle speed of an engine is basically the rotational speed the engine runs on when it is un-coupled from the drivetrain and the throttle pedal is not being depressed. The idle speed is measured in the revolutions per minute of the crankshaft.
When an engine is running at idle speed it generates enough power to smoothly operate equipment such as the water pump, alternator, and power steering but not enough power to move the vehicle itself. A passenger car will usually idle between 600 RPMs and 1000 RPMs. A properly functioning idle should run smoothly without skipping or slipping. Common reasons for this to happen:
  • Dirty Fuel Injectors: The fuel injection system injects fuel into the cylinders, which creates a mix of air, and fuel to ignite and burn. Fuel injectors have tiny nozzles to spray the fuel into the cylinder and they can become clogged over time. clogged or failing fuel injector creates a lack of fuel in the vehicle's engine. This can cause a rough idle, it can also cause symptoms such as slow acceleration or the car not feeling as if it has enough power. If the problem is addressed early, it is possible to clean the injectors, which will restore them to full function. If this condition is not addressed in a timely manner the injectors will need to be replaced. Incorrect Idle Speed: While the average idle speed falls between 600 to 1,000 RPMs, if your vehicle is experiencing a rough idle it could be due to an incorrect idle speed setting. A trained mechanic can easily adjust the idle speed, and it should stay at the proper speed. If an adjusted idle speed becomes inconsistent or changes at random intervals there may be a bigger problem that needs to be explored. Vacuum Leak: If the vacuum system has a leak, it can seriously affect the ability of the vehicle's computer to regulate the air to fuel ratio. This can lead to a rough idle and if the problem is not addressed the car may experience slow acceleration and a lack of power. Vacuum leaks should be inspected and repaired immediately. Incorrectly Installed or Damaged Plugs: Spark plugs are responsible for creating the spark that allows the vehicle to burn fuel. If spark plugs are improperly installed or malfunctioning, the idle speed can be affected. The vehicle's engine may vibrate or there may be slipping or straining sounds coming from the engine. Defective or Clogged Fuel Pump: A rough idle can be related to fuel delivery issues. The fuel pump, which is responsible for pulling fuel from the gas tank to the fuel injectors, can become clogged or defective. If this happens the engine will not get enough fuel, which can cause a rough idle, sputtering, stalling and even slow acceleration. Clogged Fuel Filter: A clogged fuel filter can cause similar problems. The job of the fuel filter is to screen out contaminants in the fuel, over time it will become clogged and need to be replaced. A rough idle is one symptom of a clogged fuel filter. Failing Electrical Components: A problem or failure in the ignition system or various electronic components can cause a rough idle. If this is the case, the problem will usually get worse as RPMs increase. Common culprits include the ignition control module, plug wires, coils, and spark plugs. Defective Airflow Sensor: A defective airflow sensor can be responsible for a rough idle. A mass airflow sensor detects the amount of air coming into the fuel injection system and sends that information to the vehicle's computer. The computer uses that data to deliver the proper amount of fuel to the air in the vehicle. Over time these sensors can malfunction or become dirty. One of the first symptoms of a malfunctioning airflow sensor is a rough idle. The car may also accelerate slowly and even stutter or stall as the problem progresses. Dirty Oxygen Sensor: Oxygen sensors measure how rich or lean the gases are as they exit the combustion chamber. Depending on the results, the amount of fuel entering the engine is adjusted by the vehicle computer. The ultimate goal is to maintain an ideal mixture that produces the lowest emissions. A dirty or failing oxygen sensor will usually trigger the check engine light and can lead to a rough idle, lower fuel efficiency and failed emission test.

Sep 28, 2016 | AC Cars & Trucks

1 Answer

Why does 93 explorer runs rough under load


Missing spark in one cylinder or injector clogged or... is your check engine light on? Are your plug wires in good condition? Maybe it is a bad u-joint in the axle shaft?

Jun 07, 2014 | 1993 Ford Explorer Limited

1 Answer

1990 toyota four runner running rough no loss of power no check engine light


spark plugs injector cleaner have u been runing with low fuel pump may be on it way try fuel injector cleaner & fill tank 90 plus octane

Dec 22, 2013 | Cars & Trucks

1 Answer

2007 Subaru Legacy Turbo GT Check engine light comes on when car idles rough. This rough idle only occurs for a copule of stop lights then it smooths out. The light eventually goes out after a couple of...


get the car scanned to find the code. many autoparts stores will scan the car for you or you can buy the bluetooth tool that connects to a phone or tablet that has bluetooth. i suspect your spark plugs might be the issue.

Sep 05, 2017 | 2007 Subaru Legacy 2.5i SE Sedan

1 Answer

What could be causing my 2004 Hyundai Elantra to idle rough while at a stop while being in drive


Could be numbers of things, get your self a bottle of fuel injector cleaner, pour all of it in the gas tank, and fill up with high octane 92 or 93, run it for while and see if change anything. Prob: Bad O2 sensors. MAP sensor, dirty plugs, bad/clogs injectors. If you have a high miles 100k change wires,plugs, good tune up would be good.

Nov 08, 2011 | 2004 Hyundai Elantra

1 Answer

My lumina takes 5-7 turns of the ignition to start up. when it does start, it idles roughly. when the gas pedal is pressed, it hesitates and sputters. its slow to gain speed and a little low on power when...


I won't stay here all night to teach auto shop

Given the age of the car

Have you considered that the exhaust converter is
about to die. 14 years is my usual projected life span
For newer cars, not long at all, as no one cares about
misfires & basically abuses their cars,those from 2002 on

That would acount for no power, as would a clogged gas filter

Lets just learn about the car & return it to factory specs
That never requires any doctor do good in a bottle,so stay
out of the auto parts store isle & injector cleaners,sea foam
& the like

You car does not need 93 Octane,so reel in the creativity

Stick to logic,physics & common sense

Yes, it will be fairly simple & you most likely put some of
the problem in there. So check your ignition wires,as they may
not be happy where you put them & no i do not have a diagram

You have a check lights at times
They have been on all vehicles for 31 years,so why do we
not have you giving us codes?
You work code issues,first,always,shame on you!

Fuel Pressure ---you checked that?
TPS Sensor -- checked that (checked doesn't mean replace)
MAP or MAF Sensors
Old Tired O2 Sensors

Test,learn how things work,test them,only replace a part
that fails a test.

Jul 04, 2011 | 1997 Chevrolet Lumina

2 Answers

Vibration at idle


it may be idle control sensor or a bad mas air flow sensor--maf sensor in otherwords. or could be engine misfire at cold temp. start. only time when cold? or does run better when warm? try warming engine to operating temperature before driving,if problem removes it's self after warm up,up grade gas to 93 octane for 1 tank full. then see if problem goes away. it's cold where you are right? if so the fuel needs to be at least midgrade 89 octane fuel because 87 octane fuel will not start your honda correctly at cold temps. in cold weather 93 or super gas octane will start ,no problem,low octane fuel sometimes gels, or freezes at low temps. if in warm climate, change the fuel filter, add fuel injector cleaner to your fuel tank[preferablly lucas fuel treatment] this will lube your fuel injectors and give better fuel mileage. thank you for choosing fixya.com

Jan 04, 2011 | 2002 Honda Accord

1 Answer

Check engine light came on the computer said misfire on number 2 and number 7. I installed new plugs and wires. The check engine light went off but it still seems to be missing and idling rough. When you...


missing at idle and good at highway speeds typically means either leaking injectors, vacuum leak and/or base engine concerns

I'd start with the injectors

May 14, 2010 | 1999 Dodge Ram

3 Answers

Check engine light came on the computer said misfire on number 2 and number 7. I installed new plugs and wires. The check engine light went off, but it still seems to be missing and idling rough. When you...


replace the cap,and rotor,if this does not help,use a good fuel cleaner,like lucas,and heet together for cleaning and moister.You may have clogged injectors,also check the fuel filter,if there is not enough fuel pressure it will do this also.

Mar 26, 2010 | 1999 Dodge Ram

1 Answer

Start and stop


Top candidates for this problem are:
Clogged Fuel filter
Faulty Fuel pump
Clogged fuel injectors
Dirty / worn spark plugs

Of these, only the clogged fuel injectors are likely to respond to a gas tank additive, and even then you need to get the right kind of additive.
If your fuel filter has not been changed in a while (couple years), start with this. It is fairly easy to change. The fuel filter is under the car near the the driver's side rear door.
If this problem started "suddenly," then the fuel pump might be the culprit.
Fuel injector / spark plug issues are not likely to stop the engine right away, but would tend to cause it to miss cylinders, idle rough, or start rough.

Mar 08, 2009 | 1985 Oldsmobile 98

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