Question about 1998 Lincoln Town Car

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Check Engine Light is on and the code is P0303

Upon returning from an 8 hour trip, when I exited the expressway and slowed to a sprre of lass than 50 mph. my check engine light came on. I purchased a Actron CP9180 AutoScanner to help me in understanding the problem. I read the code which was P0303, Mod $10 Cylindar 3 Misfire Detected. It also provided the following:

Global OBDII, Non OBD State OBD Check
Mil Status: ON
Codes Found: 1
Monitors OK: 3
Monitors Inc: 5
Monitors N/A: 3

I need help with what does these code mean as to what is wrong with this vehicle. The car is a 1998 Lincoln Town Car.

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The car has mis fired with mean an injector has gone bad or it needs spark pluges and wires i bet it needs the plugs but it could also be both replace the plugs and wires then go from there

Posted on Dec 10, 2008

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2008 Cadillac CTS returning P0303 after replacing spark plug and coil pack


Error Code: P0303
Description:
Cylinder 3 - Misfire Detected
Possible Cause:
Wiring harness, igniter and fuel injector connectors.
Ignition system. (Spark plugs gaps)
Fuel injector No. 3.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression, cylinder No.3. (check valve clearance and throttle plate for excessive wear)
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Codes p0171 p0303 p0325 car missing


p0171 = fuel system too lean, this means vacuum leak or faulty oxygen sensor

p0303 = cylinder 3 misfire

p0325 = knock sensor malfunction.

p0303 and p0325 - i can see these working together, if a cylinder misfires, it will cause the knock sensor to trip. I would lean towards the coil and or ignition module, along with a faulty oxygen sensor.

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Car keeps giving p0303 code.


Code P0303 means that there is a misfire detected on cylinder #3. This could becaused by anything from a worn out spark plug to a blown cylinder head gasket, a faulty fuel injector, a bad ignition coil, or a leaking intake manifold gasket. I have also seen this type of code caused by clogged-up EGR ports in the intake manifold on certain engines. "Freeze Frame Data" stored in your Engine computer along with the fault code is designed to help identify what engine conditions (high speed/slow speed, heavy load/light load, etc.) are producing the misfire. This helps a lot in identifying exactly what is causing the cylinder to misfire.

One way to eliminate some of the possible causes is to swap parts with another cylinder to see if the code changes.

If you have "Coil-On-Plug" ignition, you can swap the coil on #3 cylinder with the coil on #4 Cylinder and swap the #3 spark plug with the #2 spark plug. Then clear the codes and drive the car till the Check Engine (or Service Engine Soon) light comes back on.

If it still gives you P0303, then it is not being caused by the plug or the coil. It could be any of the other possible causes listed above.
If it now gives you P304, replace the bad ignition coil that is now on #4 cylinder.
If it now gives you P302, Then replacement of all the spark plugs is recommended.

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Out of nowhere, my 2004 nissan altima bucked.. then stalled after a 3 hour drive on the expressway. after letting my car sit for a about 10 minutes, i turned it back on, successful.. or so i thought, as i...


any check engine lights comeing on it sounds like a intermiting problem that will eventually give the car a tune up plug wires have the injectors cleaned

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Thats the list of things to check.
This is a #3 cylinder misfire.
There is also TSB about #3 injector needing added heat protection. This could definitely be the cause. I start at plugs and go from there.
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ok a P0303 Cylinder 3 Misfire Detected is a hard code meaning your problem is not intermetent,if you all ready changed the spark plugs and wires,the next step is to check the injector for the #3 cylinder,also if you can try using another ignition coil,check the crank position sensor and last try moving the plugs aroud to see if the code changes or if you get a new one,i dont think you will be stranded but the engine performance is crapy.

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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

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98 Lincoln TC,Cold starts fine ,runs good until warm, then shuts off. No codes,Cranks ok, have spark, PATS ok. No fuel pressure, cant hear fuel pump prime,New Fuel relay. jumped fuel pump - works. I do not hear fuel pump prime up, do not have fuel gauge, but pressing on valve in fuel rail- no pressurized fuel. Fuel regulator seems ok, not leaking / vacuum line dry as a bone. If I let it set for 15 min , it will start up again, but for a few minutes then dies out. If I let it set overnight it starts up perfectly and runs until operating temp is reached then stalls/stumbles, and shuts down. Vacuum is good while cranking, even with no start, Checked Inertia switch in trunk, it is not tripped. I have seen Ford TSB summaries' that mention issues like this , but I am not able to see to description. A point to add, the MAF sensor was cleaned, then I decided to replace it and did not make a difference. I do not have any stored codes, and the PATS is working fine, typical 2 second flash from and once key is inserted a 3 second steady light, then disappears. I have seen the TSB mentioning C103 Connector, it looks fine, I swapped out fuel pump relay with ac relay, still no difference.mention of wires around battery, do not know where to start. in dash service engine light and odometer is normal, seen other posts the say they only have lines, but mine is ok. the start of all of this , I washed engine with regular garden hose, ( not using pressure washer).also in the mean time, rear window defroster stopped working as well, can not say for same reason, but a mention.My problem started after washing engine. this is one of four Panther platform vehicles I owned with exact 4.6l w code engine, which I rinced down before. The only sensor I can think of is Oil pressure , or a corroded wire

Feb 27, 2017 | 1998 Lincoln Town Car

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