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My 2004 lincoln ls is mission i failed my emission smog test

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I assume you mean MISSING, as in MISFIRING? That means your vehicle has 1 or more cylinders not correctly firing and using the gasoline to produce power. Likely this is accompanied by reduced power and mileage, shaking at idle or under acceleration, and a check engine light on solid or perhaps even flashing while you drive.
You need to have it fixed by someone who can diagnose the problem properly. I can tell you coils are a pattern failure, or injector harnesses corrode from water intrusion, or that the valve covers on those tend to leak causing arcing to the oil...but none of that matters to your CAR. whichecver of those, or something causing the misfire is what you should fix. the cheapest, fastest, best way to find that is pay a qualified technician to scan for trouble codes and diagnose the results provided by those codes. Silver bullets and pattern fails can save a technician tyme or money, but if you can even provide code data or datastream analysis...the likelihood of wasting significant money with pattern guesses increases exponentially. Most shops will do a misfire diagnosis for a 1 hour labor fee, some include more extensive prove-outs and verification tests and charge 2 hours. Hope it helps.

Posted on Oct 03, 2009


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What might cause codes p0325 , p0304 to turn my check engine light on during smog test on my1998 Nissan Altima 2.4L No kicking No noise except the drive belt which just started after smog test

This is common in the Nissan's could be the cam and crank sensor these go at around 70000 to 120000 should do both at once to be safe. that will fail an emissions test for sure. hope this helps

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My 2002 lincoln ls is over heating ane gettin to much pressure to fast

How do YOU know & from what TESTING that:

It overheats
Getting too much fuel
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I have a 2004 L/S V8

So lets get on with specifics,not what is or isn't

The motor should run from 205 to 216 coolant temp
& near the same on head temp

You need to look at scan tool data & give me all that

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& more

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Is it going into Temp Fail-Safe

DO NOT USE THAT CAR AT ALL--until resolved

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2004 Sebring failed the emissions testing

Probably not a cheap fix.
The car will not pass the test if the light is on during the test.
The light is on when the computer has a problem that will affect emissions or performance.
You would need to have the computer scanned for trouble codes then fix the problem. Once the problem is fixed and the code is erased, the light should stay off.

Mar 03, 2013 | 2004 Chrysler Sebring Convertible

1 Answer

Ok the Guy.that ran the emissions test it don't

Check the help link

Vehicle smog test failed Due to NO MIL/check engine light?


Dec 22, 2012 | Cars & Trucks

1 Answer

What does tps data mean on 2004 lincoln ls my car slowed down the emission control symbol ignited

it may mean you have an issue with the throtle position sensor. get free computer scan at Autozoe if check engine light is on

Jul 24, 2011 | 2004 Lincoln LS

1 Answer

Emission control light stays on

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Apr 24, 2009 | 2004 Lincoln LS

1 Answer


171 and 174 indicate a lean condition. Your car is commanding additional fuel over the normal amounts and its still not enough and it set codes to tell you it happend on both sides of the engine at once. This can be caused by dirty sensors, old or worn components, plugged fuel filter, dirty injectors...a multitude of things. I could guess, but that gets expensive since I dont have scandata or know what conditions the code set under, and what are the fuel trims under various test modes for comparison. Proper procedure is to scan onboard computer and determine part from collected data. the 775 code is a transmission code.

Mar 29, 2009 | 2000 Lincoln LS

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