Question about 2004 Lincoln LS

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2004 lincoln ls hesitating and vibrating

The car has just had a tune up and all o2 sensors and coils replaced and service engine light erased. some times when u crank it it runs fine and other times it vibrates and hesitates but the service engine light still hasnt came on

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  • Lincoln Master
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It will. When it does post the code that is ion memory

Posted on Feb 24, 2012


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Posted on Jan 02, 2017

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SOURCE: when driving my lincoln 1998 after about 10 miles

Hello. I can assist you. Generally when a scan is done, the technician will clear out all of the codes and hope that the problem self corrects. I am glad you passed the state emissions test. Now let's get to the bottom of the hesitation. Generally all lincoln and ford cars that hesitate like yours have a problem with the "mass airflow sensor". Most likely you will need to replace it.
The Air Flow Sensor or Mass Airflow Sensor (MAF) is one of the components of an electronic fuel injection system and is found in many of modern vehicles. The Mass Air Flow sensor is usually installed inside the intake air duct between the air filter and the engine. The Mass Air Flow sensor is used to measure the amount of air entering the engine. This measurement is used by the engine computer or ECM to calculate proper amount of fuel injected into the cylinders in order to provide optimum combustion and low emissions.
Problems with Mass Air Flow sensors are common. Bad or contaminated Mass Air Flow sensor can possibly cause a wide range of various vehicle driveability problems such as stalling, especially when the engine is cold, misfiring, poor acceleration, etc.
In addition, a problem with the Mass Air Flow sensor often causes the "check engine" or "service engine soon" light in the vehicle instrument panel to illuminate.
The "check engine" or "service engine soon" light comes on when the engine computer detects some fault in one of the components of the emission control system.

Posted on Nov 18, 2009

  • 187 Answers

SOURCE: Car backfires hesitates when depressing gas pedal

Check the vacum lines going to the distributor and transmission. If they are leaking it could be your problem.

Posted on May 07, 2009

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SOURCE: lincoln ls shifts hard into reverse

You will have to have the solenoid body replaced in the tranny and have the PCM reprogrammed.

Posted on Feb 16, 2009

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SOURCE: 2007 Lincoln MKZ, very intermittent transmission hesitation

This is going to be either a programing issue in the transmission control module or an main control valve body concern. This vehicle is under warranty for 48 months or 50000 miles so I would have my local dealer take a look at it.
Ford has a new techincal service bulletin out on a concern similar to what you are describing. It states that if vehicle has less then 20000 miles to reprogram the PCM and TCM, if it has over 20000 miles they recommend to replace the main conrol valve body. The TSB number is 08-24-01

Posted on Mar 09, 2009

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SOURCE: I have a 2003 Lincoln LS V8. shifting shuttering


Posted on Nov 14, 2009

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1 Answer

2004 lincoln ls codes

p0300 is a random engine misfire and p0420 is catalytic converter efficieny below threshhold bank1. one easily causes the other. only way to be sure you get it fixed would be a tune up, new cat converter and o2 sensors

Aug 10, 2012 | 2004 Lincoln LS

1 Answer

Car is a 2004lincoln ls v8...its misfiring in cylinders..had a tune up didnt help,computer said throttle accelerater stuck closed and sounds like transmission is slipping?????

There is no tune -up for your car

I have the same car ,V8 --- only spark plugs

You have a bad COP Ignition Coil -- give us the code PO301 thru PO308

Change the front (2) O2 Sensors at 100,000 miles

Change spark plugs every 3 years or 60,000 miles

Clean MAF Sensor once or twice a year

If the Trans Slips ---STOP USING IT -- & change the solenoid pressure
control pack, inside trans oil pan

The bad coil is spiking the PCM & the signal comes back on the TPS
Sensor & you get throttle body (TACM) codes,forget that,work on the coils

Aug 11, 2011 | 2004 Lincoln LS

1 Answer

On kickdown the engine jerks and hesitate

Check the ignition coils,egr valve & tps sensor

You should have already changed the front (2)
O2 Sensors at 100,000 miles

Hopefully you have changed the trans & power
steering several times since new

Jun 07, 2011 | 2004 Lincoln LS

1 Answer

2004 lincoln ls is hesitating badly. when you give it some gas it hesitates and has no uphill power. If you could give me some help that would be greatly appreciated!! THANKS

Give us the codes you have ,if the MIL Lamp
is on the dash Looks like an engine

If not, you still have COP Ignition Coil Misfires

Clean MAF Sensor--CRC MAF Cleaner

Replace both (2) FRONT ONLY -- O2 Sensors
at 100,000 miles

Also if the EGR Valve is original it is worn out
Any Vacuum load,which mostly prolonged is going
up hills

You still have bad coils,you will get 2 a year on an
LS and most Fords

V6 or V8 ???

Mar 27, 2011 | Lincoln LS Cars & Trucks

1 Answer

2003 lincoln ls what does the codes 420 and 430 mean

PO420--Catalyst System Efficiency Below Threshold (Bank1)
PO430-- " " " " " (Bank2)

O2 Sensor
Coolant Temp Sensor
High Fuel Pressure
Bad Converter

Owning a 2004 V8 myself--I will say your need to go thru the entire engine, as to how it is running
It may be overheating due to coil misfires or other issues and ruined the

You need to solve all issues before replacing a converter
I would stay far away from a dealer, unless you have a couple thousand to spend

Nov 02, 2010 | 2004 Lincoln LS

1 Answer

My Lincoln LS 2004 has the Check engine light on and the scan shows 3 problems: P0306, P0351 and P316, do you think these problems can be solved with a mayor tune up?

There is no such thing as a major tune-up

PO306--could be COP Ignition Coil #6 misfiring

PO316--is a misfire on first 1000 revolutions.
You always get that,disregard

PO351--doesn't apply to the LS,disregard also

Aug 11, 2010 | 2004 Lincoln LS

1 Answer


vibration is not likely to be an O2 sensor

rarely will I ever see an failed O2 cause anything but bad gas milage and a check engine light

More likely would be bad spark plugs/wires and/or maintenance items like a fuel filter

May 20, 2010 | 2000 Lincoln LS

1 Answer


You don't have wires,you have COP-Coil-On-Plug system.
If you have the codes,you could change the coils yourself.Their $59.00 at the auto parts store.

There is a misconception about tune-ups.
You only have spark plugs,and air filter,that would need replacing,that effect engine performance (Tune-Up)
Also, you can Clean the MAF Sensor,in the ducting,between the air filter and throttle body,with CRC MAF Cleaner. You could spray the inlet to the throttle
body,but I wouldn't bother.
I consider plugs& filters ,general preventative maintainance,nothing really tunes the engine,but it's own processors.

If you remove the coil cover, on top of the valve cover,you access the coils.Have to remove the coils to get to the plugs. The plugs aren't your issue,unless they have been in the engine for years or the valve cover O"Rings are leaking oil onto the plugs. Three coils seems questionable.

Get me the codes!

May 18, 2010 | 2004 Lincoln LS

2 Answers

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Replaced a camshaft sensor still running rough & engine light still on, 2004 lincoln nav. 5.4 liter

Jan 02, 2010 | 2004 Lincoln Navigator

1 Answer

Engine sputter

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Jul 16, 2008 | 2001 Lincoln LS

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