Asked by Jul 26, 2015 at 11:59 AM about the 2005 Lincoln LS V6 Premium

Question type: Maintenance & Repair

On my 2005 Lincoln LS 3.9ltr when cold I have a misfire check engine light comes on code read P0305 meaning #5 cylinder misfire, BUT once engine gets to normal operating temperature runs smooth and no misfire only does it when cold after warm up goes away. Changed out MAF, throttle body, checked for vacuum leaks also installed 8 new coil paks before the P0305 code I had a MAP or MAF check engine code so this is why I changed out those parts. Now I have just that one code P0305 but confused as to why engine runs smoothly with no misfire after engine reaches normal operating temperature very puzzled. Any comments or solutions.??

14 Answers


Move the #5 sparkplug and coil pack (I know it is new) to another cylinder to see if the miss moves. If the miss doesn't move with the parts it is likely the #5 fuel injector. The #5 fuel injector can also be moved to better isolate the problem.

1 people found this helpful.

excellent never thought of fuel injector but why after getting to normal engine running temperature the engine runs smooth as can be

1 people found this helpful.

Maybe something warming up and expanding or making contact. I would not just buy an injector, I would move it to see if that is the issue before investing in parts.

1 people found this helpful.

thanks really appreciate your comments I will try moving things

1 people found this helpful.

Buy new ignition coil pack with new sparks... Problem fix.

1 people found this helpful.

Did you replace the spark plugs when you did the coils? When the engine is cold remove the #5 spark plug. Is it wet? If so, is it oily, gasoline, or coolant? HTH. -Jim


Thanks no only replaced all the coils I just replaced the #5 coil now will see what happens in the morning when cool, if still doing it I will remove the spark plug and see if there is any moisture on it or if it is dry. I will di this when engine is cool. Thanks


currently engine is at running temperature and no problems what so ever. Never misses a beat very smooth but time will tell once cooled down Thanks


You're welcome. Glad to help. Keep us posted. - Jim


I changed out the coil and the misfire is gone, but check engine light came back on and getting a MAP code error, did some checking and the main plug to the EGR valve is not making a true circuit all the time, squeeze the plug and voltage changes, so going to try a new EGR plug


Just for those 2005 Lincoln LS owners with a 3.9ltr V8 engine there is a MAF in line with the air intake and also a MAP sensor on top of the EGR valve which can only be replaced with a new EGR valve. It looks like it is built right into the EGR valve, Hope this helps out all those check engine light errors with a manifold absolute pressure sensor error.

1 people found this helpful.

Most likely its out buy new one....


After installing a new tstat and a new DCCV I am still getting 2 different temperatures of air coming from the passenger side and drivers side. Both are set at the same temp but one side is hotter or colder than the other puzzled. any ideas its in my 2005 Lincoln LS 3.9ltr

3 people found this helpful.

What can it be after yu change throttle body and sparks and coils and yu crank it and it starts to smoke?

Your Answer


Looking for a Used LS in your area?

CarGurus has 329 nationwide LS listings starting at $2,400.


Lincoln LS Experts

  • #1
    Ionatan Ion
  • #2
    Tom Demyan
  • #3
    Jonathon Sheffield
View All

Related Models For Sale

Used Ford Mustang
270 Great Deals out of 37,082 listings starting at $2,150
Used Lincoln Town Car
24 Great Deals out of 1,358 listings starting at $1,995
Used Dodge Charger
242 Great Deals out of 32,689 listings starting at $1,800
Used Chevrolet Impala
397 Great Deals out of 25,595 listings starting at $799
Used Chrysler 300
313 Great Deals out of 19,328 listings starting at $1,899
Used Cadillac CTS
173 Great Deals out of 8,000 listings starting at $2,150
Used Honda Accord
424 Great Deals out of 101,059 listings starting at $1,200
Used Acura TL
72 Great Deals out of 3,428 listings starting at $799
Used Lincoln Navigator
83 Great Deals out of 3,883 listings starting at $1,995
Used Toyota Camry
761 Great Deals out of 70,900 listings starting at $1,200

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.