Seemingly misfires
At first this only was an issue when driving longer distances (20 miles or so) but now even when driving just a couple miles it does this. The car kinda chugs when accelerating and when this happens the check engine light turns on. The engine seems to be giving off more heat and what looks like an exhaust manifold glows a bright red(like it's getting really hot). I took it in to get it checked for a bad catalytic converter but it doesn't have one.
My car has a manual transmission.
My car has a manual transmission.
Experienced mechanics share their insights in answering this question :
Hi…your vehicle has an on-board diagnostic system, albeit the early version known as OBD-I. What I would therefore recommend, to get this engine running condition diagnosed and repaired, is you request a check engine light diagnostic. The trouble codes that are presently stored may be sufficient for the certified Mechanic to resolve this. If not, there are some obvious possibilities such as a lean misfire, perhaps caused by a failing fuel pump. Lean misfire would also explain the engine overheating. Due to the age of the vehicle, and possible high mileage, the mechanic may recommend checking engine compression, too, to see if any mechanical issue could account for the misfiring.
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Ford Ranger P0300 Causes
Multiple 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.
Intermittent misfires are almost always caused by a weak spark or a lean fuel mixture. That piece of knowledge may not tell you what exactly is causing the misfire, but it should lead you toward a coil problem or an injector problem. Random misfires are another type of misfire that can be very difficult to diagnose.
A malfunctioning ignition coil will cause your vehicle to misfire when you accelerate. In extreme cases, a misfire could cause your vehicle to shut down while you are driving. The misfire is a result of one of the cylinders fires incorrectly or not at all.
A misfire feels like your engine suddenly loses power. You might experience a hesitation when you try to accelerate the vehicle. If it feels like your vehicle is accelerating slower than usual or if it feels rough, the cause could be an engine misfire.
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.
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.
CAR ENGINE MISFIRES
In severe cases, dirty fuel injectors can cause your engine to misfire. The misfire occurs when there`s difficulty with the air and fuel mixture entering the engine. This problem will usually cause the car to vibrate. You might even hear a jerk and pop sound.
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.
Worn or fouled spark plugs are one of the most common causes of engine misfires. These small but crucial components deliver the spark that ignites the fuel in your engine. If they`re not working properly, your engine won`t be firing on all cylinders.
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.
A weak pump that isn`t delivering adequate pressure can cause an engine to run lean, misfire and hesitate when accelerating. The volume of fuel is just as important as pressure. A good fuel pump is usually capable of pumping at least 750 ml (3/4 quart) of fuel in 30 seconds.
If the problem is the fuel filter, and it isn`t changed soon, you may find that your vehicle won`t start at all. Misfire or rough idle. A dirty fuel filter could prevent the engine from getting enough fuel. Vehicle stalling.
What kills ignition coils is location; being mounted in one of the hottest, most vibration prone and dirtiest parts of the engine. Modern ignition coils are typically located between two camshafts on the valve cover and exposed to dirt and oil.
Fuel injector nozzles can become clogged over time, which can lead to a sputtering engine, slow acceleration and the car not having enough power. Fuel injectors can be cleaned if the problem is caught early, but as the conditions worsens, the injectors may have to be replaced.
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.
Fuel injector nozzles can become clogged over time, which can lead to a sputtering engine, slow acceleration and the car not having enough power. Fuel injectors can be cleaned if the problem is caught early, but as the conditions worsens, the injectors may have to be replaced.
A misfire code is set when the computer detects a situation where there is an unexpected change in crankshaft speed. With most engines, the crank sensor is the key component in determining a misfire.
What to do? The best way to avoid an engine misfire condition is through following the scheduled maintenance in your manual. Keep your vehicle`s engine tuned according to factory specs. Plus, a yearly trouble-code scan by a well-equipped shop will uncover any potential problems before they become major faults.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Random Misfire on Nissan Sentra
ANSWER : There are at least two recalls of the 2003 Sentra involving engine management issues. Consequently, you should first check your VIN at the NHTSA website to see if your vehicle is affected by any recalls. Carefully check the EGR system. If EGR is stuck open you can get global misfiring. Check the integrity of the PCV system, too. The fuel system needs to be ruled out including the mundane, but real, possibility that you have a tankful of bad gasoline. The actual fuel system pressure should be tested and verified against factory specifications. Injector operation should be verified. PCM failures that can account for global misfiring are rare but they do happen. It will be helpful to look at the engine operation using a real time scanner and also download freeze frame data from the misfiring episodes. If you want these diagnostic 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.
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Cylinder 4 misfire, fuel injector looks to be the problem, only misfires on start up or idle, is it safe to drive?
ANSWER : Driving for an extended period with a misfiring cylinder can certainly do damage. That cylinder will run hotter because of the misfire and piston and/or valve damage can occur. If you need help having this repaired, a certified professional from YourMechanic can inspect the misfiring situation and have this addressed properly.
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After i changed the crankshaft position sensor, i have a code p0302 which is a misfiring code.
ANSWER : The crankshaft and both camshaft position sensors should be replaced at the same time. Nissan had recalls on these sensors. Also, a simple compression test should be performed to verify no mechanical issues exist.
This car is known to have problems with the fuel injectors, this can be checked with a stethoscope to ensure they are clicking. Consider having a mechanic diagnose your car and replace your crankshaft and camshaft position sensors if necessary.
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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.
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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.
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I have an intermittent misfire – 2002 Pontiac Grand Prix
ANSWER : Hi and thanks for contacting YourMechanic. The EGR can cause a misfire if it is stuck open when the engine is cold or running at a lower speed. The EGR replaces some of the air with burnt fuel to help cool the engine down, but when trying to accelerate, the engine will starve for fuel and cause a misfire.
Remove the EGR, clean it out and put it back on and retest the engine. I recommend replacing the EGR. If you need further assistance diagnosing the misfiring issue, then seek out a professional, such as one from YourMechanic, to help with your vehicle.
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Cold engine misfire and hesitation – 1997 Dodge Dakota
ANSWER : Hi. I believe the ambient air temperature sensor, which measures the intake air temperature for engine management, has failed. It is reporting a far higher temperature than the engine is getting, as you have noted. Engine management is creating a leaner mixture for the engine than it really needs during cold start, so it misfires and has low power.
Replacing this sensor should improve cold start behavior. I would recommend having a certified mechanic, such as one from YourMechanic, come to your location to determine why the car is hesitating and replace the air temperature sensor if needed.
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My Ford f150 has a misfire on #4and#7 I checked the coils and plugs but they seem to be firing what else do I need to do
ANSWER : In order to isolate the cause of the misfire you will need to do an engine compression and leakdown test to make sure the compression is good and no valves are burned. If compression test is good on all cylinders then you will need to remove lower intake manifold and have carbon cleaned out of the EGR ports and blown out with shop air to clear out all the carbon from intakes and EGR ports on cylinder heads.
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