Engine misfire on all cylinders
I have a 2005 Honda Odyssey that I just bought a couple of days ago. The engine light has started blinking so I checked the codes it says engine misfire on all cylinders. When the van idles it sometimes revs up to a high rpm then goes back down and starts to stall. When driving it, it has a major loss of power and takes a lot of acceleration to get it to go. Spark plugs have been replaced. What could be causing this?
My car has 191000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
The actual codes would be needed to steer you in a precise direction. Generally, global misfires are a consequence of a major fuel and/or air induction system issue. Your vehicle has individual spark plug coils so that is not likely to be the issue unless the PCM coil driver is bad but that is rare (and is the last thing to check). If the check engine light is flashing when you are presently driving the car that requires immediate repair because the misfiring that is represented by that flashing light has the potential to damage the catalytic converter which can result in additional costly repairs. Carefully check the EGR system and intake air leaks. If EGR is stuck open you can get global misfiring. Check integrity of PCV system. The fuel system, including the possibility of leaking injectors, needs to be ruled out including the mundane possibility that you have a tankful of bad gasoline. The actual fuel system pressure and output should be tested and verified against factory specifications. If you want these steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a misfiring diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.
How to Identify and Fix Common car Problems ?
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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.
Honda Odyssey P0303 Causes
Cylinder 3 misfires can be caused by many reasons from a faulty ignition system, fuel system, or internal engine failure. The most common reason for this to happen is faulty or worn-out spark plug coil packs, especially if it`s been a while since you had a tune-up.
Honda Odyssey P0300 indicates that two or more cylinders are experiencing misfires.
If the check engine light in your Honda Odyssey starts flashing, that means that the problem needs precipitous attention and your Honda should be brought in urgently. This flashing light usually illustrates a rigorous engine misfire allowing unused fuel to be dumped into the exhaust system.
If an oxygen sensor or mass airflow sensor is failing, it could give incorrect data to your engine`s computer, causing the misfire. When a vacuum line is broken, it can cause a fuel-injected motor to misfire.
Honda will voluntarily recall 120 Odyssey vehicles and 150 Pilot vehicles from the 2013 model-year in the United States to replace the engine short block, free of charge. Engine pistons in these vehicles may not have been properly hardened during a heat treatment process.
Due to a malfunctioning VCM system, (Honda has not confirmed the malfunction yet), these cars are prone to excessive oil consumption, which can lead to an engine misfiring. In these situations, vehicle owners are required to monitor oil levels and add oil as needed.
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.
While you can still drive a car with a misfire, it`s not a good idea. A misfire could be a sign of several different engine issues. If you continue to drive without resolving the issue that caused the misfire in the first place, it could potentially cause more extensive damage to your engine over time.
A blinking check engine light will show up on your dashboard is almost always correlated with engine misfires. A misfire means that the engine is dumping uncombusted fuel into your car`s exhaust system. Engine misfire is a serious issue because it can quickly raise the temperature of the catalytic converter.
The check engine light will come on when any of the following issues are detected by your vehicle`s computer. Shaking or vibration may be caused by things such as faulty spark plugs, poor fuel pressure or misfires.
An engine misfire—a problem that almost always causes an increase in hydrocarbon emissions —is one of the many reasons why the check engine light might illuminate (or start to flash). Usually, when the check engine light is on and the car is shaking, that means you`re dealing with an engine misfire.
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.
There are several possible causes for all four cylinders to misfire, including: A problem with the ignition system, s.
When a P0300 trouble code is triggered, it indicates that misfiring occurs in random or multiple cylinders. This happens when there is a deficient amount of fuel being burned within a cylinder. Most cars have between four and six cylinders, with each cylinder firing a spark plug continuously and smoothly.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
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.
engine light-p303 cylinder 3 misfire, changed spark plugs,ingition coil and cylinder valves
ANSWER : Coils and plugs are usually the starting point for a misfire code, but some basic diagnostic work might save you some money. Sometimes I like to try swapping components from cylinder to cylinder to see if the misfire moves before buying expensive parts. There are a few other problems that could lead to a P0303, like ignition primary problems, vacuum leaks, or bad injectors, but those things are usually accompanied by other codes. It’s clear that you have a dead miss. When the ECU sees a consistent misfire, it shuts off the fuel to that cylinder to prevent damage to the catalyst. The the CEL will start blinking to warn you that you may be doing damage by continuing to drive. You’re at a point where you need to have a professional do some diagnostic work. by contacting Your Mechanic, you can have a technician come to your home or office to check out your misfiring VW and recommend a fix.
What would cause 1st cylinder misfire, multiple misfire, all fuel injectors circuits open and o2 sensors heater circuit high on a 2008 Dodge Charger
ANSWER : Hello. It sounds like you may have the wrong parts installed on the car. Due to the fact that multiple people have worked on it you may have some parts that do not meet specifications. From what it sounds like to me though you either do not have an ECM in the vehicle with the correct programming or you have a connection issue. If all of the grounds are not clean and tight then that will cause this. if they are then the computer needs to be programmed to your vehicle at the dealer and that may take care of it.
Misfire on cylinder one
ANSWER : A misfire to cylinder 1 may be a fuel pressure regulator sensor problem but it is most likely due to a clogged injector on number one. You will need to scan and view data to see if fuel pressure sensor is needing replacement first. Then have the injectors cleansed to see if the codes go away.
I’d suggest you get this looked at by a qualified technician who can perform these checks to diagnose your Check Engine Light and make the appropriate repairs to your vehicle.
4th Cylinder misfire when start the engine
ANSWER : Eliminating the ignition coil and spark plug is a good start. Seeing as the misfire only occurs randomly and when cold leads me to believe you have a small vacuum vacuum leak or carbon build up on your engine valves.
Ensure your oil dipstick is sealing tight.
I would recommend having a fuel injection service performed on the vehicle first. Typically a 3-part service is recommended where additive is added to the fuel tank, a cleaning solution is ran through the vacuum side of the intake manifold (cleaning the valves also), and solution is run through the fuel injectors. This should take care of the possibility of carbon buildup hanging your valves slightly open.
Next I would have the vehicle checked for vacuum leaks. The vacuum leak can be diagnosed with a smoke diagnostic machine or using a scan tool with data values and monitoring the oxygen sensor values while spraying around the intake and vacuum lines with carburetor cleaner. The 1.6L engine also had a problem in the PCV system which caused an internal vacuum leak. The PCV valve is integral to the valve cover, which requires replacement of the whole valve cover. To test for this condition a sensitive vacuum gauge is hooked to the oil dipstick tube and with the engine running the value should be under 10 mBar. If over, you need a new valve cover. I have done several of these with less than 60,000 miles.
Finally if the problem is still there, I would perform a cylinder leak-down test on that cylinder to check the engine valves for leaking. This requires a special tool, compressed air, and service information.
I tried to list the suggestions in easiest and most likely fixes to harder and least likely fixes. As you see most of the diagnostic procedures require special tools. If you would like to have the misfire diagnosed, you can contact a professional technician, such as one available from YourMechanic.
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.
I have an 4.7 HO engine for my jeep. Cylinder 5 misfire and low pressure on passenger side. Replaced spark plugs and coils.
ANSWER : Hi there. To be completely honest, anytime a head gasket service has been completed, I typically throw "common causes of an engine cylinder misfire" out the window. In most cases, a head gasket gasket fails due to an overheating problem. Although most mechanics will spend lots of time resurfacing cylinder heads, replacing valve guides or bent valves and push rods, what they tend to forget is that when an engine overheats, it typically destroys electrical harnesses and sensors. The first thing I would recommend is to check all ignition system electrical connections; especially to crankshaft and cam position sensors. A damaged or exposed electrical harness might short occasionally, which can cause the inconsistent misfiring problem. The low engine pressure on the passenger side might be a symptom of the cylinder five misfire issue, but could also be damage to a piston ring caused again by the head gasket failure.
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.
