Engine misfiring in a 2007 BMW 328i
Engine indicators are showing a misfire in the engine. I changed the air filter and cleaned the carburetor, but the engine is still misfiring.
Experienced mechanics share their insights in answering this question :
Your BMW is fuel injected so I’m guessing you cleaned out your throttle body. The next thing I would look into is the coil for the culprit cylinder, have a certified mechanic, like one from YourMechanic, inspect your vehicle and try swapping it with another cylinder and see if the misfire follows the coil. If so, theres your problem. If not, try the same thing with the spark plug and fuel injector until you can move the misfire.
How to Identify and Fix Common car Problems ?
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One potential cause of engine misfiring in BMWs is faulty wiring. Over time, all the parts of your car become worn and in need of replacement or repair; this include the spark plug wiring. Your car combines fuel and air in order to properly fire the engine.
Lean misfires occur when the ratio of air and fuel in the engine is misaligned, whereas ignition misfire occurs when there is a fault in the power stage of the cycle. Finally, mechanical misfire can occur at any stage of the process and is usually due to a failure in any of the mechanized parts, such as the pistons.
A car owner will start to notice the misfiring engine when there is a jerking or sputtering feel when you drive the BMW, even if you drive at normal speeds. When the car stops, a misfire from the failing ignition may cause the vehicle to shake and vibrate.
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, or P0308 are all OBD II fault codes that indicate that one or more cylinders are experiencing a misfire. BMW Misfire faults are common.
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.
Engine misfires happen when one of the cylinders does not produce sufficient spark or compression and lack of fuel. It could involve more than one cylinder. It can be caused by a faulty spark plug, fuel injector, ignition coil and or worn cylinder.
Engine misfire occurs when one or more of the cylinders fail to provide power to your vehicle with the possibility of raw fuel making its way into the catalytic converter. You should consider engine misfire to be a severe condition and have it repaired right away to avoid expensive repairs and a possible car fire.
A clogged or failed exhaust gas recirculation or crankcase ventilation valve or faulty oxygen sensor can send the wrong signals to the computer and cause misfires.
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 damage can be slight or serious, depending on how severe the misfire is. You might experience decreased engine power, increased fuel consumption, and a jerking engine. Other symptoms include popping sounds, a smell of gasoline or engine oil, and thick exhaust clouds coming from the tailpipes.
A cylinder misfire in your vehicle is a serious issue that could lead to significant damage to your engine. If you suspect you have a misfiring cylinder, it`s important to get it inspected and taken care of quickly.
Yes. While the damage may seem small initially, the longer you drive with a bad oxygen sensor, the worse the damage will become. Eventually, you may experience rough idling, poor acceleration, engine misfires, an illuminated check engine light, and failed emission tests.
Dirty fuel injectors may cause your vehicle`s engine to misfire. This problem makes the motor feel as though it is sputtering — sending vibrations through the car. Such misfires can happen when a fuel injector problem mixes up the delicate balance between fuel and air entering the engine.
An engine misfire results from incomplete combustion (or zero combustion) inside one or more cylinders. But to you, the problem will usually feel like hesitation or shaking when the car is running. In modern vehicles, the Check Engine Light will also pop on when there`s a misfire.
Symptoms. The signs of a leaking turbocharger system start with a lack of power or random misfires.
If the engine is running rough or your check engine light illuminates, the cause may be excess oil contacting the spark plugs and causing a misfire.
A misfire will cause the engine to momentarily stumble, or lose rpms, and then regain its normal engine speed. The misfire will usually reappear, either under specific operating conditions or randomly. A misfire may occur when your engine is idling, causing a rough or uneven idle.
Dirty or Old Spark Plugs
If your engine is misfiring, you may be able to fix the problem easily by replacing your spark plugs. Spark plugs are relatively easy to remove from engines and inspect for damage, and at less than $25 a piece, they are relatively cheap to replace, too.
Engine Misfires: A failing camshaft position sensor can cause your engine to misfire. Transmission Shifting Problems: The data sent to the engine control module can stop the transmission from shifting properly.
your engine misfires and shakes: if a map sensor reports a false high pressure reading, the engine`s computer will signal for more fuel. this results in a rich mixture, which can foul the spark plugs and cause a cylinder not to fire. a misfiring engine will shake and transmit that motion into the cabin of the vehicle.
If the combustion cycle isn`t running smoothly, the engine won`t be as powerful and you`ll notice the difference in performance. If you notice that you`re stalling more frequently, or that the engine is sluggish when you press the gas pedal, it`s a good idea to get the ignition coil checked out.
When there are no codes, but there is a misfire that would typically trigger a code, use your vehicle information database to determine what the enabling criteria for setting a code is. In the case of a misfire a P0300 (random or multiple cylinder misfire), or specific cylinder P0301-P0306 should have triggered.
However, most misfires dissipate, and your engine regains its normal speed after a second or two. But even a single misfire is usually a sign that something else is wrong and that more misfires will likely occur in the future.
There are several types of engine misfires, including lean misfires, ignition misfires, and mechanical misfires. The cause of a misfire is when air/fuel is unable to ignite on the compression stroke. One or more cylinders can fail and not produce the desired/expected power.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
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.
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.
Read Full Q/A … : Engine misfiring in a 2007 BMW 328i
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.
Read Full Q/A … : Engine misfiring in a 2007 BMW 328i
Can front wheel drive car engine power rear wheel drive
ANSWER : Anything is possible with enough engineering. The changes you are looking at would take major structural changes and would definitely not be an easy job. You could possibly consult a manufacturing engineer to get more details on how this could actually be carried out and whether it would be feasible.
Read Full Q/A … : Engine misfiring in a 2007 BMW 328i
Engine misfiring in a 2007 BMW 328i
ANSWER : Your BMW is fuel injected so I’m guessing you cleaned out your throttle body. The next thing I would look into is the coil for the culprit cylinder, have a certified mechanic, like one from YourMechanic, inspect your vehicle and try swapping it with another cylinder and see if the misfire follows the coil. If so, theres your problem. If not, try the same thing with the spark plug and fuel injector until you can move the misfire.
Read Full Q/A … : Engine misfiring in a 2007 BMW 328i
How do you replace the rear & side engine mounts without lifting out the engine? & how do you lift the engine out?
ANSWER : Hi…thank you for your questions. If required in the application, a portable engine support bar is used to support an engine during mount replacement. The support bar has lifting capability as well so that the mount can be unloaded and removed. If a particular repair application requires a "crane" (complete engine removal for instance), such are portable these days in any event. With regard to the exhaust system repair, mechanics use ramps to gain access. Six ton portable jack stands will safely support a car two feet into the air which provides more than enough access to repair or replace any exhaust system component. If you desire replacement of the mounts, please refer to YourMechanic’s motor mount replacement service page. For exhaust leaks, please use the exhaust system inspection/repair page page. Once on each of those service pages, if you click on "Get a Quote" and enter your vehicle information (year, make, model) you can obtain cost info and schedule the service. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.
Read Full Q/A … : Engine misfiring in a 2007 BMW 328i
Engine malfunction light, reduced engine power, engine powered down
ANSWER : Hi there. There are a lot of things that can cause this on your 2012 BMW M5. I usually start by scanning the computer for codes to see what comes up. If there are not codes then I load test the alternator and the battery to see if they are failing. Low voltage in the electrical system will cause this. If that is fine, then it is usually caused by a failing throttle body. I have seen a lot of these fail due to the motors in them hanging up. If the problem is only happening intermittently, this can make the issue hard to duplicate, but you can still have tests done on the car. If you are going to have this fixed, consider YourMechanic, as a certified mechanic can come to your home or office to test the vehicle and diagnose the Engine Malfunction Light.
Read Full Q/A … : Engine misfiring in a 2007 BMW 328i
I have a 2010 camry. I just recently replaced the engine with a 2014 camry engine. Now I have Four engine lights on. I replaced on
ANSWER : If you swapped the engine from a vehicle that is 4 years newer than the car is then you are going to have electrical and sensor incompatibilities that may not be able to be fixed by just a few sensor replacements. There were many changes in computer and emission related items between 2010 and 2014 engines. I would recommend having a mechanic like one from YourMechanic come to you and compare the two engines to isolate the possible differences and see if the problem can be fixed.
Read Full Q/A … : Engine misfiring in a 2007 BMW 328i
Check engine light refuses to go off after engine replaced
ANSWER : Hello there, you have a long series of issues going on with your 2013 Hyundai Sonata. If you keep getting a repeating oil light on than there is likely a fault in that system.
Since this fault has lasted after the engine was replaced it could be a oil pressure sensor, wiring harness fault, ECU fault, oil pump, oil strainer clogged, or low oil pressure.
To diagnose this issue properly you need a complete vehicle inspection to start from square one and identify the root cause of all this.
Read Full Q/A … : Engine misfiring in a 2007 BMW 328i
