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Misfire

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Symptoms of a Bad or Failing Ignition Cable
Common signs include a decrease in power, acceleration, and fuel efficiency, the Check Engine Light coming on, and visible damage to the cables.
Symptoms of a Bad or Failing Ignition Coil
Common signs include the Check Engine Light coming on, engine misfiring, rough idle, a reduction in power, and the car not starting.
How Long Does a Top Dead Center (TDC) Sensor Last?
The top dead center (TDC) sensor is the point from which the firing order is determined and the ignition system measurements are taken. The measurements are normally defined as before...
How Long Does an Oil Cooler Last?
The heat that the engine produces can produce a lot of damage in the right situation. Making sure that all of the systems on a car that reduce the heat of the...
Is it Safe to Drive With a Misfiring Engine?
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,...
Symptoms of a Bad or Failing Timing Belt
Common signs include a ticking noise coming from the engine, an engine that won't turn over, engine misfires, and oil leaking in front of the motor.
Symptoms of Bad or Failing Spark Plugs
Common signs of faulty spark plugs include slow acceleration, loss of power, poor fuel economy, engine misfires, and difficulty starting the car.
Symptoms of a Bad or Failing Fuel Pump
Common signs include a whining noise, hard starting, engine performance issues, and an inability to start the car.
Symptoms of a Bad or Failing Timing Chain
Common signs of a faulty timing chain include engine misfires, metal shavings found in the oil, and rattling sounds from the engine while idling.
Is it Safe to Drive With a Misfiring Cylinder?
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.
Symptoms of a Bad or Failing Valve Cover Gasket
Common signs of a faulty gasket include a burning oil smell, dirty valve cover, oil leaks, low engine oil, and a rough-running engine that misfires.
How Can Problems with the Ignition System Cause Misfiring?
Misfires are never good, and they're always a sign that there’s a problem with the engine that needs to be repaired. The problem won’t “go away on its own” and waiting too long...
Why Misfires are Often Misdiagnosed
Properly diagnosing a misfire can be a challenge, as a variety of symptoms can cause it, or a different problem could be present.
The Check Engine Light Demystified
Your car Check Engine Light can mean many things. The Check Engine Light comes on when there's an electrical or mechanical problem with your car.

Related questions

Question
How much does it cost for ignition misfire in a Chrystal Sebring 2001
To diagnose misfiring costs in the range of $70 to $80. The causes of misfiring are quite varied, however, and so the total cost to repair will only be understood once the cause(s) are pinpointed. For example, if a defective...
Question
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
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....
Question
Continuous misfire of cylinder 2
Cylinder compression in all four cylinders should be verified. Secondary firing patterns should be scoped to get independent verification (i.e., apart from what the OBD-II system might be reporting) that indeed the problem is just in cylinder no. 2. If...
Question
Misfire on cylinder 2
Compression in cylinder No. 2 should be tested. If compression is within spec, a possibility is an oil leak into cylinder no. 2. With regard to the fuel injector, verify its operation as, although the injector may be new, the...
Question
What can be causing my car to have OBD2 codes: P0301- P0306 come up on scanner? Could the cooling system cause this?
P0300 codes are all misfire codes. the last digit designates the cylinder where the misfire was detected. In your case P0301 and 306 mean the misfire was detected on cylinders 1 and 6. You probably won't be able to fix...
Question
Was told engine was performing plenty poorly
If you have a valve cover leaking oil onto the spark plugs then it can cause a misfire. This does not mean the leaks are the cause but a possible cause. I would recommend having a mechanic like one from...
Question
2009 gmc acadia..car starts but when you put it in drive it cuts off
Hello, thank you for writing in. To begin, there are several recalls and issues known to happen with the Acadia within your year range. If you have not already looked up your VIN to see if your vehicle was part...
Question
Car misfires then goes to limp mode.
When the vehicle goes into limp mode when the engine misfires, the computer is shutting down the electronics to the transmission to prevent damage to the catalytic converter as the fuel condition is either too lean or too rich. Check...
Question
1996 Jeep Grand Cherokee with 180,000 miles. As I'm driving it starts to sputter but still going the speed limit.
Sounds like the crankshaft position sensor is loosing connection when driving. Check the harness to the crankshaft position sensor and see if there is a loose wires or if the contacts can be loose when pushed against. The harness could...
Question
My truck was getting codes of P0300 & P0420 & P0430. My truck can't go over 40/45MPH without jerking 1997 Chevrolet Tahoe
Hello - the first task is to check problem codes to see if the P0300 (misfire) code is still present, or others. If so - which seems to be what your description indicates - you may have ignition coil, crankshaft/camshaft...
Question
GM Dealer cleaned injectors and caused P300 Code? Buick Ranier
Hello - this seems unlikely, but sometimes cause-and-effect are not obvious. The answer to this question would be helpful: "Was the car misfiring or otherwise running badly before the "injector cleaning"? Was the Check Engine light on, and if so,...
Question
What causes Cylinder misfire? Spark plugs, wires and coil pack already replaced 2005 Dodge Stratus
Hello - in addition to the components which deliver spark on command (which you have already replaced), are the components which determine when the spark should be delivered (crankshaft and camshaft position sensors). A bad fuel mixture will cause misfire...
Question
Rough in morning. 0 compression. after heats up runs okay to 100 compression. in 3 cylinders only on a Miata 2004.
Your engine has morning sickness. There is no way for the engine to have a 0 compression as the engine would not start, so there has to be at least 60 pounds of compression to ignite the fuel. The issue...
Question
My Lincoln ls 2004 has 9 codes at onece
Hi there. Your vehicle is in a lean mixture state. The fuel system is not supplying enough fuel to the engine. Check the fuel pump to see if its working by putting on a fuel pressure hose on the fuel...
Question
2003 Hyundai Sonata 2.7 v6. Hello my car randomly bucks / jerks at stop lights in drive and is way worse and constant when the ac is on.
Hi there. It sounds like your engine is misfiring. Check the spark plug and wires to see if they are firing. If the spark plugs are firing, then the fuel pump could have an issue or the injectors could be...
Question
I have Pontiac G6, it shakes when idle. Usually when I drive and stops on signal. I read some code and it shows P0300 and P0301.
The codes P0300 and P0301 are coming up for a misfire on cylinder number 1. Check the cylinder for spark, fuel, and air. Check the spark plug and make sure that it is firing. The spark plug wire could have...
Question
My buddies GM 4.3 liter just had the ignition modal replaced but now it runs and upon acceleration it sputters and backfires.
If the ignition module is new, it is more likely that the cause of the poor acceleration lies elsewhere. You can check to see if any diagnostic trouble codes have set using a code scanner. If there are no codes,...
Question
My car shakes badly mostly between 40-70 mph and gets better when I left off gas.. Help plz
Hello, thank you for writing in. The most common cause of shaking is a misfire. Misfiring is a general term for any kind of issue with the combustion of the air fuel mixture in the combustion chambers. Start by having...
Question
After my check engine light for my 2003 Honda Civic came on, I took it in and the code said it needed spark plug and ignition coil.
Hi there. Check the computer for any other codes to see if the same code came back or if something else popped up. If the same code came back, then there could be an issue with the wiring to the...
Question
2002 Nissan Sentra GXE is smoking out the tail pipe. I replace a knock sensor and the code for the knock sensor still pops up.
HI there. There are different symptoms that create smoke that emits from the tail pipe. Here is a description of the different smoke for you to check: Smoke Types Blue: Blue smoke is an indication that the engine...

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