2008 VW Passat Komfort that is misfiring could it be engine coil? How much might it cost to fix?

I'm thinking of buying a 2008 VW Passat Komfort that is misfiring and the check engine light is on. I did a little research online and found that it could need an engine coil replaced. I don't have a lot of details yet as I just found the car on carfax. I am in desperate need of a car (without a car note) and this one is selling for $1,950. It has 144k miles on it, no major accidents, looks awesome and has had 3 previous owners. Based on the problem above, do you think I should consider buying this car or walk away? Thanks.

My car has 144000 miles.
My car has an automatic transmis

Experienced mechanics share their insights in answering this question :
It’s true that the car you’re looking at may just need an ignition coil. It’s also true that it might need an ignition module, a fuel injector, an intake manifold, or it may even have valve damage. Many times I’ve had people come into my shop with similar stories of cars that they bought that were supposed to need "one little thing" only to discover that they have purchased a car that needs MAJOR repairs. If you are serious about the car, you should invest some money into having it checked out before you buy it. You could contact Your Mechanic about investigating the misfire or you can ask them to do a Pre Purchase inspection It could save you a lot of money and headaches.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

By far the most common cause of an engine misfire are bad spark plugs. A spark plug in each cylinder of your engine converts an electrical impulse into a spark that ignites the fuel and air mixture. Over time, the spark plugs will wear out — though modern spark plugs are rated to last as long as 100,000 miles.
Repairing or replacing a cylinder can range from $100 to $1,000. Different causes for misfires cause different severities of damage that each cost varying amounts to repair. These damages are: Slower fuel delivery issues can cost anywhere from $200 to $1,000.
What Does Volkswagen Passat Code P0303 Mean? Volkswagen Passat P0303 definition: Cylinder 3 misfire detected. Issue Severity: SEVERE – Stop driving immediately. Repair Urgency: Fix this code immediately (same-day if possible) to avoid ignition failure, catalytic converter damage, and dangerous conditions.
Repairing a misfiring engine can be simple or complicated, depending on the reason it is misfiring. The most common causes of engine misfires are: worn spark plugs, weak fuel injector, vacuum leak, worn valve seals, carbon tracking, and no voltage at the coil.
The most common causes of misfires are worn, improperly installed, and mishandled spark plugs, malfunctioning ignition coils, carbon tracking, faulty spark plug wires and vacuum leaks.
How much does it cost to fix an engine misfire? Depending on the misfire`s cause, the repair and replacement cost might range between $100 and $1,000.
An engine misfire can be caused by bad spark plugs or imbalanced air/fuel mixture. Driving with a misfire isn`t safe and can damage your engine.
Diagnostic trouble code (DTC) P0303 stands for “Cylinder 3 Misfire Detected.” The code indicates that the powertrain control module (PCM), has counted enough misfire events on cylinder 3 to store the misfire code for that cylinder. Cylinder number 3 would refer to the third cylinder as the cylinders are numbered.
What the P0303 code means. The P0303 DTC is set when the ECU detects multiple misfires from cylinder 3. Misfires cause the ECU to set the Check Engine Light and put the vehicle into a failsafe mode to prevent damage. The Check Engine Light will remain until the code is repaired.
In most cases, this simply means you have a faulty or intermittent spark plug (an issue with the ignition coil is also very common). As spark plugs wear and corrode, they lose their ability to ignite on command. In most cases, replacing your spark plugs will solve a misfire problem.
Any unusual shaking or vibrating forces coming from the engine is cause for concern. It could be something as simple as old spark plugs producing an uneven power delivery, it could be something serious like worn or broken engine mounts, or it could be even more serious in the case of internal engine damage.
Use a spark plug socket to remove the plug to get a good look at it. The damage you see will help you determine the cause of the misfire. If the spark plug is just old, replacing it may solve the problem. Make sure to replace and properly gap new spark plugs.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

2008 VW Passat Komfort that is misfiring could it be engine coil? How much might it cost to fix?
ANSWER : It’s true that the car you’re looking at may just need an ignition coil. It’s also true that it might need an ignition module, a fuel injector, an intake manifold, or it may even have valve damage. Many times I’ve had people come into my shop with similar stories of cars that they bought that were supposed to need "one little thing" only to discover that they have purchased a car that needs MAJOR repairs. If you are serious about the car, you should invest some money into having it checked out before you buy it. You could contact Your Mechanic about investigating the misfire or you can ask them to do a Pre Purchase inspection It could save you a lot of money and headaches.

Check Engine Light is on – P0302 and P0304. Ignition coil recently replaced.
ANSWER : The two Diagnostic Trouble Codes, P0304 and P0302, refer to cylinder misfiring. A faulty ignition coil, spark plug, wire, and so forth can cause a cylinder to misfire but there are other possible causes, too. Consequently, the only way to determine the actual cause or faulty part is to perform an engine diagnostic during which each relevant part and system is tested.

If an obvious and common cause, such as a bad coil, is not immediately found during the diagnostic, these additional possible causes of engine misfiring would have to be evaluated: oxygen sensor(s), fuel injector, burned exhaust valve, catalytic converter(s), poor compression, clogged EGR valves or tubes, wrong ignition timing, vacuum leaks, low fuel or low fuel pressure, leaking head gasket, bad camshaft or crankshaft sensor, bad mass air flow or throttle position sensor, and defective computer (least likely cause).

I recommend having a certified mechanic, such as one from YourMechanic, come to your location to determine why the car is misfiring and suggest the necessary repairs.

Code said cylinder 1 misfire, cylinder 2 misfire, o2 sensor misfire?
ANSWER : Without checking the ignition coils and spark plugs myself for proper spark output I would say the engine is misfiring and may be the coils and plugs. It is also common for the valve cover gasket to leak oil into the spark plug tubes shorting the coil and spark plug out so it cannot fire. The check engine light is flashing due to the misfire is active and additional catalyst damage can happen if you keep driving with the misfire and raw fuel dumping into the catalyst. I would recommend having a mobile mechanic like one from YourMechanic come and do a through diagnosis to see if the valve gasket is leaking into the spark plugs and caused damage to the coils and spark plugs. If it is leaking then the valve cover gasket should be replaced with the spark plugs and contaminated ignition coils replaced then computer codes an be cleared and the vehicle road tested for any other problems from driving the vehicle with the engine misfiring.

Misfire, but ignition coil is good so what could be causing this? 2004 Dodge RAM 1500
ANSWER : Hi there – there are several possibilities for your misfiring engine: the new coil is bad as well (moving the coil seems to have moved the problem?), oil or debris in the spark plug recess that is causing shorting between the plug and block, or an incompatibility between the plugs and the engine combustion chamber. (Some engines don’t tolerate multi-electrode designs and misfire.) I would recommend a misfire inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Engine misfires and check engine light is always on
ANSWER : It’s always a good idea to pull over and turn off your vehicle when the check engine light is blinking. A blinking check engine light usually means there is a severe misfire in one or more of the cylinders. Most of the time, a misfire symptom is the result of a fouled spark plug. Honda now recommends changing spark plugs at 110,000 miles, however it is a known fact that spark plugs are considered a wear item and they do indeed wear out. There are a lot of factors that go into a spark plug wearing out or prematurely wearing out. One thing to consider is the type of gasoline being used in the vehicle. A top tier gas is recommended in most newer vehicles. This is because top tier gas contains additives which keep the engine free of deposits that may cause spark plugs to foul prematurely.

Honda is aware of this concern and has issued a technical service bulletin to help reduce and, in some cases, eliminate this concern. This technical service bulletin advises the technician to update the vehicle’s engine computer. This update improves fuel injector and variable camshaft timing during cold starts and eliminates excessive fuel from fouling out the spark plugs. I recommend you have a certified mechanic inspect your ignition system to determine the exact cause of this misfire so the proper repairs and preventative maintenance can be performed and get you back on the road again.

Honda Pilot engine misfire when cold out and engine running warmer than usual?
ANSWER : Hi There,
It sounds like you may have a faulty coolant temperature sensor. This sensor relays the temperature of the coolant back to the ECM which uses this information to control many things such as when to turn the coolant fans on and off as well as how much to adjust the air to fuel ratio in the motor. Both of these functions are affected when this sensor is not working properly. If the senor is reading incorrectly, this may cause inaccurate temperatures to be read, thus causing inaccurate adjustments to be made to fuel and to the operation of the cooling fans (i.e. staying on too long or not coming on soon enough to help keep the motor cool). I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

Had harmonic balancer replaced twice in 3 months, one week after fixing it the 2nd time the engine threw a rod
ANSWER : The only way to determine what is broken, and who is potentially responsible or at fault, is to physically examine the engine. Speculation in the absence of a physical, on site examination is not going to help you. If you are asking generally, "can a mechanic cause damage to my car?" of course the answer is emphatically yes and that is why you should be exceptionally careful in who you deal with and ALWAYS ask tons of questions in order to gauge "who" you are dealing with. An easy decision rule, covering ALL aspects of life, is don’t deal with anybody who doesn’t love to answer YOUR questions, in this case about your car, that you spent your hard earned money on.

With regard to the harmonic balancer, when the FIRST replacement was performed, that should have concluded it. That is, the first repair should have been lasting. As far as why the first repair failed, again hard to say without what we call a forensic exam, but a possibility is the pulley bolt may have been either under tightened or over tightened. Either mistake can cause the balancer to come off. If there is internal engine damage, the engine can be repaired or replaced. Either is no big deal and if you desire to consider your options, and costs, please simply contact YourMechanic and a certified mechanic will be dispatched to diagnose what you have and set out for you repair strategies. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

my car its the engine misfire and only works with 2 sparkles out of 4 do you know how much its going to cost the labor
ANSWER : Hello, thank you for writing in. The most common and simple reason for these issues are bad spark plug wires. You can easily test this by swapping the wires on both the spark plugs side and the ignition coil side. If the next spark plug then misfires, you know you need to replace the cables. You may also need to test and replace the ignition coil. If you do replace the ignition cables, make sure you replace all of them at the same time. The same goes for the spark plugs themselves. For more help with testing the ignition system, contact our service department to schedule an appointment.