Question about 2003 Lincoln LS

1 Answer

Error code P0353

Replaced Cylinders 1-4 plugs and coils, still misses after it is warmed up. Checked spark from each Coil with a grounded spark plug and it is getting spark. Could this error code be wrong and it is another cylinder on the drivers side Cyl (5-8) ?

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  • John Cordio
    John Cordio Jan 10, 2014

    "Also, it seems to run fine no miss at cold start up (wisconsin) but soon as it warms up, it then misses and has a foul smell coming from the exhaust."

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  • Lincoln Master
  • 15,645 Answers

It might be getting spark but that spark might be out of the allowed timing signal that triggers it. You can not tell without a scope.

Posted on Dec 30, 2013

Testimonial: "Also, it seems to run fine no miss at cold start up (wisconsin) but soon as it warms up, it then misses and has a foul smell coming from the exhaust."

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SOURCE: misfiring

if it were the cranksensor it would not start at all.you would have no fire.

Posted on Jan 14, 2009

  • 91 Answers

SOURCE: Cylinder location diagram for a 2004 lincoln aviator

It could be a fuel injector problem on cylinder 5. Sounds like a failed injector. Run a compression check on that cylinder to make sure you have at least 100psi. Anything less than that would lead to either a burnt valve or a piston ring issue. Doing a compression check first will save you a lot of money.

Posted on Apr 10, 2009

  • 1 Answer

SOURCE: Check Engine Light is on and the code is P0303

Hello I need a help.
I have 1999 lincoln town car 4.6L V8.They have check engine light on. P 0303 cylinder 3 missfire.
I was changed spark plugs,fuel filter. check compression test 150psi. fuel pressuer 50.
swiching cylinder 1 to 3 fuel injector and coil. but they still have engine code

Posted on Apr 12, 2009

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Coil pack is firing on two cylinders


Check for cracked or grounded out spark plug wires.If one of the wires of the other two cyylinders is grounded out it will not let the coil build a charge for ignition.

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Cylinders 1 and 4 have the same coil for both, so concentrate on that coil. You still have a good blue spark on cylinders 2 and 3? If you have spark there, I don't know about the cam sensor-I think it would be good if it works at all. You need to check if you have 12 volts power to the coil for 1 and 4.

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Hello mikew564.The first diagnosis was number 2 or 3 cylinder not firing. Once you changed the coil, the check engine light went off. When the light came back on again, did you get it diagnosed again to find out if the problem was the same?... 2 or 3 cylinder not firing????

First of all, there is NO extra wire/ground on the coil/ignition wiring (see images below). The spark plugs and ignition plug wiring can be checked for arcing, corrosion, resistance and can be checked for cracks in the insulators or worn electrodes (and spark gap) by a competent mechanic.
If you are having the same issue (2 - 3 misfire), there are several techniques for eliminating the plug wires or spark plugs. Spray water on the plug wires to see if they are arcing. Swap plugs from cylinders 2 & 3 with cylinders 1 & 4. If you still have a 2-3 misfire, check/inspect/examine the coil connector pins & coil harness to the coil(s) themselves.

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I have a 2002 Chevy Tracker. Lately it's developed a serious miss, almost as if you turn the key off while it's running. Almost immediately it catches back up again. I don't get backfiring. I'm trying...


Maybe its time for new spark plug,,, this is an inexpensive refresh and something the mechanic will do if he starts troubleshooting the engine miss. While you are installing the new spark plugs, give your spark plug wires a CLOSE VISUAL inspection for burns, cracks, or other defects that would cause a misfire..Once you have replaced the spark plugs..checked the wires, ..and if the miss is still there, its time for a qualified professional to look at it.. they will hook it to a diagnostic machine and tell you what happening... good luck..... and no, it hasn't "slipped timing"..

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Could only be a few things. The coil #1, Fuel injector #1, Stuck intake or exhaust valve, or blown head gasket allowing coolant into cylinder #1. Use a spark tester to check the spark coming out of cylindr #1 if checks good then ohm test the injector when it is warm. Check other injectors to compare. Do a compression test on cylinder #1 and test other cylinders to compare. If cylinder is low compression suspect valves and or head gasket. If compression is low then het a leak down tester to test if a valve is broke or sticking. On your sable i would suspect injector or coil most likely.

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2000 Ford F350 with a Triton V10 is misfiring in cylinder 3 and 7


A very common proplem with this engine is the coil packs sit on top of the spark plugs with a approx 4 inch boot to the spark plug. Especially when there is wet weather moisture will get the the spark plug hole and when the vehicle gets up to temp the moisture will atomize and ground out the spark plug. Sometimes it will not even need to get hot and once it starts missing won't go away.
You will need to run a scan to determine which hole is misfiring. Then disconnect that coil and remove the one small bolt retaining itand pull it up out of the hole. Then take compressed air and blow out the bottom of the hole to dry it out. Re-install coil and your problem should have gone away. If you have a scanner sometimes just clearing the codes and the miss will go away. Be careful taking it to a shop as most shops will just sell you with the fact that you have a bad coil and have it fixed in the process of selling you and installing a new coil of hey maybe they will just blow it out and seeing as it's fixed you now buy into the fact that they replaced a "bad coil". That is not to say that sometimes it is just a bad coil and nothing else will fix it.
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According to the obd code i am getting a misfire in the number one cyln and it kind of sputters what is causing it


1. Bad or fouled Spark Plug at #1 Cylinder.
2. Bad or misfiring Wire going from the #1 on the Distributor/Electronic Ignition Coil to the #1 Cylinder.
3. Misfiring at the #1 on the Distributor/Electronic Iginition Coil.

a. Unplug the #1 Wire at the #1 on the Distributor/Electronic Ignition Coil.
b. Using an Auto electrical testing: Probe, wire and ground clip electrical, stick the Probe into the opening at the #1 Distributor/Electronic Ignition Coil. Use the grounding clip - clipped to a portion on the engine.
c. Start the Vehicle and check for rhythmic spark.
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f. If there is rhythmic spark: Reconnect the #1 Wire at #1 on the Distrubutor/Electronic Igntion Coil.
g. Disconnect the #1 Wire from the #1 Spark Plug.
h. Again using an Auto electrical testing: Probe, wire and ground clip. Insert the Probe into the end of the #1 Wire and clip the ground clip onto the engine.
i. Start the engine again.
j. Again Check for rhythmic spark.
k. If there is NOT rhythmic spark the #1 Wire needs to be replaced. (Replace all Wires as a Set).
l. If there is rhythmic spark then the #1 Wire is fine.
m. Turn off the engine,
n. Remove and Inspect the #1 Spark Plug. Clean if necessary and Regap.
o. Reinstall the Spark Plug and reconnect the #1 Wire.
p. Restart the engine.
q, If the code reappears:
r. Replace all the Spark Plugs.
Let me know if this helped or if you have additional information or questions. Feel free to contact me at FixYa.Com.

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1990 Subaru Legacy shorted out the ignition coil. I replaced it and in less than 1 mile,it shorted out the new one.


Subaru engines (including Legacy and engines of many other automobiles, GM, etc.) have returned to so-called wasted spark ignition systems since advent of the electronic distributor-less ignition (having been used historically in early engines with magneto ignitions). With this approach, the ignition systems are less expensive and usually quite reliable. At the same time, however, a shorted spark plug (cracked or carbon clogged, etc.) (or bad ignition spark plug wire) grounds both the ignition spark and the false spark being used. This means that it also grounds the corresponding respective ignition spark of the other 180 degree out of phase cylinder (that uses the same the same coil because the spark current is connected to the spark plugs of two cylinders). Since such a defect allows more current to flow in the spark coil to two plugs when the resistance of the spark plug gap disappears due to a cracked plug, etc, it seems likely to hasten coil burn out if the spark plug/plug wire defect is not corrected before installing the new spark coil.

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