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Lincoln LS random misfire

111 messages,  Last post on Apr 16, 2013 at 7:01 PM

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What is this discussion about? Lincoln LS, Engine, Sedan

Messages Page 11 of 12

#100 of 111 Re: 2004 LS Misfires [rlc11] by toomanyfumes

Oct 18, 2012 (1:06 pm)

Replying to: rlc11 (Oct 17, 2012 1:23 pm)
Sounds like it may be the coils

#101 of 111 2003 Lincoln LS, V6, 112,000 miles - Engine & wrench illuminated by angelica6

Dec 04, 2012 (11:58 pm)

While driving my car, the engine light and wrench light illuminated and then my car powered down to about 20 to 35 mph. I pulled over and turned off my car, then the wrench disappeared and my car was able to accelerate at higher speeds. My dad checked under my car because I noticed oil leaks on my garage floor. The engine oil filter was just about to fall off because the bolt was very loose. Three weeks ago I had my engine oil changed at the dealership I frequent for oil changes since I bought my car there almost 10 years ago. Could the engine oil have leaked on the valve cover gaskets, coils, and spark plugs that you talk about? My dad noticed engine oil on the alternator and in other places and just wiped the oil off. I called the dealership when my dad noticed the oil filter was very loose ready to fall off. He has an Actron which output the following: P2107 Tac Module Processor, P2110 Tac System Forced Limited RPM, PO356 Ignition Coil F Primary/Secondary Circuit Malfunction, and PO303 Cylinder 3 misfired detected. The Actron indicated that the following were OK: Misfire monitor, fuel system moC Refrig Monitor, Oxygen Sensor, and EGR System Monitor. Also noticed the rubber on the right back wheel well inside the car in front of the gas tank where the gas cap is is like blown off and black soot is on the inside metal along the rubber where the door closes at this wheel well. Did this occur from the misfire? I often would smell something burning. Do you think the problem stemmed from the engine oil leaking out onto whatever else is near the engine? Do you have any suggestions?

#102 of 111 Re: 2003 Lincoln LS, V6, 112,000 miles - Engine & wrench illuminated [angelica6] by akirby

Dec 05, 2012 (8:20 am)

Replying to: angelica6 (Dec 04, 2012 11:58 pm)
The oil filter doesn't have a bolt so not sure what you meant by that.
 
One incident like that would not be enough to cause coil failures. I would clean it up and make sure no new leaks are occurring and see if you continue to have problems.
 
The TAC errors listed indicate a problem with the throttle by wire system which may or may not be related to the oil and misfire problems.

#103 of 111 Re: 2003 Lincoln LS, V6, 112,000 miles - Engine & wrench illuminated [akirby] by metal56m

Feb 25, 2013 (9:44 am)

Replying to: akirby (Dec 05, 2012 8:20 am)
I have a 2003 Lincoln LS V8. It has 122,000 miles. My engine was misfiring and I have had this problem before (coils) and had the diagnostics run and it showed cylinder #3 coil. I changed that coil and it helped a little but still had misfires. I went ahead and replaced all the spark plugs. It ran really smooth for a day and after that it started to misfire again, worse than ever. Could this issue be fuel injectors? What else could it be?

#104 of 111 2003 LS V8 Misfire Nightmare! by metal56m

Feb 25, 2013 (12:02 pm)

I have a 2003 Lincoln LS V8. It has 122,000 miles. My engine was misfiring and I have had this problem before (Had two coils replaced at the dealership previously) and had the diagnostics run and it showed cylinder #3 coil. I changed that coil and it helped a little but still had misfires. I went ahead and replaced all the spark plugs. It ran really smooth for a day and after that it started to misfire again, worse than ever. Could this issue be fuel injectors? What else could it be? When I changed the plugs, there wasnt really any oil that I could see...

#105 of 111 Re: 2003 LS V8 Misfire Nightmare! [metal56m] by akirby

Feb 25, 2013 (12:07 pm)

Replying to: metal56m (Feb 25, 2013 12:02 pm)
Go ahead and replace all the coils. Make sure there is no oil on the rubber boots. If there is replace the boots and fix the leak (usually valve cover gaskets). You may have to replace the spark plugs again.

#106 of 111 Re: 2003 Lincoln LS, V6, 112,000 miles - Engine & wrench illuminated [metal56m] by angelica6

Feb 26, 2013 (1:00 pm)

Replying to: metal56m (Feb 25, 2013 9:44 am)
I have a 2003 Lincoln LS, V6 with about $120,000 miles on it. Over the holidays, I had the same problem with the engine misfiring and powering down. I read all the messages on this site and one in particular from a mechanic lead me to do the following as he indicated should be done and I have had no problem since November, 2012. All spark plugs, ignition coils, and valve cover gaskets should be replaced. However, the dealership I bought my car and who services it saw the oil on a few spark plugs, coils, and gasket on passenger side and none on the driver side. They recommendeded replacing everything on the passenger side because it is not the parts that cost, it is the labor and the cost to take apart the engine on the passenger side is costly so it pays to just replace all spark plugs, coils, and gasket on that side. They recommended replacing the spark plugs only on the driver side even though there was no visible only, but because spark plugs should be changed at least every 100,000 miles and it is not costly to change the coils and gasket on the driver side because they are right on top of the engine unlike the spark plugs, coils, and gasket on the passenger side wherein the engine needs to be taken apart. It cost me just about $1,200, but it was worth it because I have no problems. Caution: I had a couple of backfires right after they were replaced only because the sensor needed to work out the bugs and get back on track. That lasted for only a couple of days. It has now been almost 4 mos and I have had no problems. If the coils and gasket go on the driver side, it will only cost me $110 each to replace -- for the 3 about $330. I have read others messages wherein people take their Lincoln to an independent mechanic and have incurred lots of dollars, only to have to take it to a dealership that knows about the Lincoln LS problems. Really when you think about it, spark plugs need to be changed every 100,000 miles so the $1,200 it cost me to replace these parts is just really maintenance ... your car is not falling apart ... it is just necessary maintenance for a high performance car.

#107 of 111 Re: 2003 Lincoln LS, V6, 112,000 miles - Engine & wrench illuminated [angelica6] by toomanyfumes

Feb 26, 2013 (7:01 pm)

Replying to: angelica6 (Feb 26, 2013 1:00 pm)
I had a miss on my LS V6' replaced the coils and plugs myself on the drivers side, the car ran fine for about a year. It started missing under load, I figured the three coils on the passenger side needed to be replaced, the intake manifold needs to removed to get to those. I ended up trading the car on a new Mustang before I had it done.

#108 of 111 Random and one by one COP misfire problems by redfender

Mar 12, 2013 (4:15 pm)

I have a 2004 Lincoln Ls with 3.9 I have had misfires one by one the last two years. car has 63,000 miles, car has been flawless. replaced three coils one at a time as code appeared. just started it up on Friday and have four coil codes at once and four distinct misses. cannot run car. Lincoln dealer did replace cop and plug on each code every time with their program. Just today they did two coils at once. leaving one original coil left. drove it home engine lite still on and when i got home barely, as it was misfiring worse than when i went in... I checked codes and it still showed Po503 po506 po507 po508. all the same codes as just before i had it fixed this morning. they replaced 3 and 7 leaving only 6 never replaced yet. No one there can diagnose what is wrong, they are scratching their heads. i have garaged car and am affrid to drive it as it is really missing on at least two or three cyls. car was running perfect last week when i parked it and on Friday last week just when i started it it was misfiring on many cyls. what else could be prob, as cam sensors are new, etc. Dealer ruled out everything. Please Help if you know what to look for that they haven't already. always had the hard 2nd and 3rd gear shift prob also, they reprogrammed the computer for the trans as their is a program for that also and that also didnt work. Help????

#109 of 111 Re: Random and one by one COP misfire problems [redfender] by angelica6

Mar 12, 2013 (10:11 pm)

Replying to: redfender (Mar 12, 2013 4:15 pm)
While driving my Lincoln2003 with 112,000 miles the engine light and wrench light illuniated on my dash and then my car powered dow to about 20 to 35 mph. I pulled over and turned off my car, then the wrench disappeard and my car was able to accelerate to higher speeds. The Actron read showed the codes P2107 Tac Module Processor, P2110 Tac System Force Limited RPM, PO356 Ignition Coil F Primary/Seconary Circuit Malfunction, and PO303 Cylinder 3 misfired detected. A mechanic replied on Edmonds to help me with my car issues and I followed his directions and I no longer have any issues with my car. His reply was ...
"The primnary fault is the valve cover gaskets. These DOHC motors have a gasket around the edge of the cylinder head and an innter gasket which seals the center part of the valve cover from allowin goil to leak down to the spark plugs. It is the inner gasket which is the culprit. The stock inner gaskete will fail and allow oil to leak down to the spark plug tops, which causes the coils to discharge voltage not only to the spark plugs but to the cylinder head (through an oil to ground short). Voltage will be lost at the plugs as a result of this short and the check engine light can be intermittently tripped. This situation can also cause the coils to fail (on the diag). Dealers will want to replace the faulty coils and plugs, make quick easy bucks and wait for the whole shebang to fail again due to the real problem of oil pooling at the plug/coil interace due to the valuve cover gasket problem. The real fix here is to do the valve cover gasket job using FELPRO gaskets. The FELPRO kit comes iwth an innter gasket that has multiple sealing ridges to prevent innter gasket failure. The stock inner cover gaskets don't have this feature. So remove air intake plenum, remove valve covers/coils/plugs, replace with new plugs, install new FELPRO gasket set/covers and tighten, check coils OHM reading b/t poles (any that don't match the others replace), install coils, retorque valve covers, install intake."
 
However, I took my 2003 Lincoln LS to the dealership I bought my car and that services it for maintenance and it is a dealership that sales and services Lincolns. They did their diagnostics and found the issues that I did from the Actron reading. I showed them the mechanic's response from Edmond's and they agreed that the culprit is the damage spark plugs, coils and gaskets for the reason they saw oil leaked on them which shorted the spark plugs causing my car to misfire just like the mechanic from Edmond's site had said. I asked them to replace all coils, valve cover gaskets, and spark plugs with oil on them as well as those without oil so I don't have to experience the same problem again and have them tear apart the engine again and charge me costly labor. Because there was no oil on the coils, valve cover gaskets, and spark plugs on the drivers side, only on the passenger side, the dealership suggested changing only those on the passenger side because the engine needs to be torn apart to get to them on this side not the driver's side. But, because spark plugs should be changed every 100,000 miles, some say every 50,000 miles, the dealership suggested the spark plugs on driver's side be replaced also. The dealership advised that, if in the future, the coils and valve cover gaskets get oil on them and become ineffective, they can be replaced for little cost since they are on top and no engine needs to be torn apart on the driver's side. It cost me $1,100 to get the #1, #2, #3 ignition coils and both valve cover gaskets on passenger side replaced and all six spark plugs on the passenger and driver's side replaced. Labor in itself for tearing apart the engine on the passenger side cost me $549.68, the rest was for parts. Afterward, I checked with another ford dealership that serviced Lincolns and the cost was about the same, a little less. It took 2 days to replace them and test my car out and the dealership gave me a free rental. So it was worth it.
My car runs like a charm now. The only think that occurred a week after the parts were replaced was that my car powered down while driving it to and from work and the engine light would go on here and there. The mechanic at the dealership told me that the car needs to work it out, that the sensors will be off for a little while but then catch up to the new parts and it did. It only last for a couple of days. I the work done on December 7 and I have had no problems since then, about 3,000 miles since then.
I hope this helps. I have read other's same problems and they tried to save money fixing it themselves or going to car repair shops other than a Lincoln dealership and spent lots of money only to end up going to a Lincoln dealership after the damage was done in their bank account. Just better to go straight to a Lincoln dealership who is aware of the problem with the Lincoln LS. When I came in there with my problem, they immediately knew of these problems with the Lincoln LS. However, I recall that somewhere I had read on Ford website or elsewhere, not sure, that Ford has a recall for the 2004 Lincoln LS on this issue for cars under 75,000 miles. Not sure where I read it or if it was legitimate information. You will want to check it out with Ford.

Messages Page 11 of 12

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