I just just the battery in my car and when I go to start it, it misfires/runs like crap.
I just changed my battery and when I go to start my car it wants to turn over but it's sounds awful/runs like crap. It sounds like it's misfiring really bad.
My car has an automatic transmission.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Hi there. Typically, replacing the battery does not cause ignition or fuel system problems; which commonly is the source of engine misfiring problems. It is very likely that the two are not related. The best way to determine what is causing this problem is to have a professional mechanic come to your location and complete an engine misfiring inspection.
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.
Your car`s misfiring could very well be caused by a defective battery as it powers the entire electric system. Batteries can interfere with fuel flow to the injectors, suppress charges to the ignition coils, and a host of other problems. Fuel pump processing may be slowed down by a weak car battery.
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.
Symptoms. The signs of a leaking turbocharger system start with a lack of power or random misfires.
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.
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.
Do you hear a sputtering sound when you turn the key? This sound is a tell-tale sign that your battery isn`t getting enough charge and, consequently, isn`t sending enough power to the rest of the vehicle. This sound might be subtle at first, but as time goes on, the sputtering will get louder and longer.
Typically, when a person jumpstarts a car, sparks can occur. That`s why it is recommended that you connect the negative jumper cable to the vehicle body and not the negative post of the battery.
A Bad Crankshaft Position Sensor
The crankshaft position sensor monitors the position and rotational speeds of the crankshaft. Without the crank sensor, the engine control module (ECM) wouldn`t know when to fire the fuel injectors and ignite the spark plugs.
Most failures are caused by the three `turbo killers` of oil starvation, oil contamination and foreign object damage. More than 90% of turbocharger failures are caused oil related either by oil starvation or oil contamination. Blocked or leaking pipes or lack of priming on fitting usually causes oil starvation.
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.
Vacuum leaks, especially those that are confined to one cylinder, will cause the engine to idle unevenly and possibly misfire. This is because the vacuum leak allows additional air to reach the affected cylinder, diluting its air/fuel mixture.
Can a Bad Car Battery Cause Computer Problems? A faulty battery can have an impact on all of your automobile`s electronic components, including the car computer. If a malfunctioning battery is unable to provide the necessary electrical energy to a computer, it could result in issues.
If your engine misfires or stalls when you are idle or when you stop suddenly or accelerate, there could be a problem with your ignition coil. A misfire — which can sound like a coughing or sputtering noise or feel like a jerk or strong vibration — means that one of the engine`s cylinders is not firing correctly.
If you`re driving at freeway speeds and notice your engine sputter or jerk, you may have a failing fuel pump. This problem is caused when the fuel pump can`t deliver a smooth flow of fuel to the engine; periodically, your engine receives only air when it was expecting to receive fuel.
Internal components: A weak battery affects performance by causing damage to the engine`s internal parts. The low voltage causes the temperature to go up, and overheating can result, which causes damage to the engine parts.
If a flame or spark is brought too close to a car battery with improper ventilation, hydrogen gas from the battery can explode, splashing battery fragments and acid all over your skin. Sparks (arcing) between a car battery terminal and other metal parts can cause the metal to get hot enough to burn you.
The reason a battery sparks when you connect it is because of the potential difference between the two contact points. In simple terms, if the car has something that is requiring energy before the battery is connected, it will create a larger potential difference, which ultimately leads to a spark.
Why won`t my car start but the battery is good? If your car won`t start but the battery is good, the most common cause is a faulty starter – though it could also be to do with your fuel. You may have insufficient fuel to get the car going.
The ESC module is one of the components that directly controls engine spark, so if it fails, it can leave the vehicle without spark. A vehicle without spark may still crank, but will not be able to start or run.
Symptoms of misfiring spark plugs include rough idling, uneven power when accelerating, and an increase in exhaust emissions.
With the low mileage on the vehicle, the apparent poor maintenance, and the conditions the vehicle is operated in, it appears the most likely cause of the misfire is carbon buildup.
A faulty crankshaft sensor will cause your engine to misfire as incorrect fuel injection readings weigh in. When this problem becomes especially apparent, the engine may stall and have difficulty restarting. Rough idling and backfiring are two more indicators that something is wrong.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
My car will not start Intermittently. I purchased a new battery 2 weeks ago and yesterday the car wouldn’t start. Got a jump and
ANSWER : The issue you are having is probably due to an intermittent fault in the starter motor itself or a deficiency in the starter electrical circuit, for example a large voltage drop due to a poor ground or a high resistance connection. These issues can be readily diagnosed and resolved on a mobile basis if you request a hard starting diagnostic. If you request that diagnostic, the responding certified mechanic will get this resolved for you promptly. Based on Toyota’s Factory Service Manual, the battery should not be disconnected if the vehicle engine is running. The battery acts as a large resistive voltage sink and consequently taking the battery out of the circuit, while the alternator is still running, can create a voltage spike on the car’s electrical system which is not good for voltage sensitive components such as the engine computer. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.
2005 Chrysler 300C changed battery and alternator. Car started, ran, and then battery light came on. Shut car off and wouldn’t start.
ANSWER : Hi. There is a couple of things that could be wrong here. The battery or alternator that was just installed could be defective. Theses parts need to be tested for proper operation. There also could be a fuse, fusible link, or wiring for the battery or charging system that is blown or broken causing the battery light to come on.
The codes that you have will cause the car to shut down, run rough, or not start at all. The crankshaft sensor and camshaft sensor should be replaced. I suggest having a certified technician from YourMechanic come diagnose the charging system and check engine codes to help you proceed with correct repairs.
Brand new car has problem starting 2016 Nissan Sentra
ANSWER : Hi – the "hard start when hot" sounds like a weak starter solenoid – unusual for a new car. "Heat soak" the transfer of heat after a vehicle has been driven, can sometimes cause weak electrical components, like the starter solenoid, to fail while hot, but work properly once they have cooled down. Since your vehicle is under warranty, I would seek correction through the dealer where you purchased the vehicle. If this is not satisfactory, call Nissan Customer Service to escalate.
Car left two days didn’t start third day, lights go on, no start up. AAA battery charger started car.
ANSWER : Hello. It sounds like you have a battery issue. If the jump starting got the vehicle going then that means that the battery alone could not produce enough power to start the vehicle. If the battery is low enough it can power some of the lights and other electrical circuits in the vehicle and just not crank it. If you want to have your battery checked, consider YourMechanic, as a certified mechanic can come to you to [diagnose why the car does not start] https://www.yourmechanic.com/services/car-is-not-starting-inspection
Water was spilled in the trunk which soaked the car battery. Car won’t start now. Does water destroy a car battery?
ANSWER : Hi, thanks for writing in about the concern with the BMW 320i. If the battery was submerged in water then it’s completely possible for the battery to short out and die. Your friend will need to have the battery replaced. Also be sure to get all of the water out of the trunk. Have a certified technician, like one from YourMechanic, help you guys out if you need assistance with replacing the battery. Good luck.
Charging warning light comes on when i turn the key and try to start the car and the car want start but when someone tried to give
ANSWER : Hi there:
If you recently replaced your battery, the issue may be caused by a malfunctioning alternator or other electrical component that comprises the charging system on your Nissan Sentra. The best way to find out which item specifically is faulty, is to have a professional mobile mechanic complete a car is hard to start inspection. This will allow the mechanic to determine the precise source of what’s going on with your Sentra and recommend or complete the right repairs.
Car won’t start 2002 Toyota Camry
ANSWER : Hello – your symptoms are a bit confusing. The "starts, but shuts off rather quickly" behavior could be a security system problem with your key. The stalling when slowing or stopped could be dirty throttle body, malfunctioning idle air control valve, or other fuel supply issues. I recommend a hard starting inspection to get to the bottom of this, performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.
went from starting quick to running like crap and sound like crap also has a small back fire noise like say B with ur lips silnt
ANSWER : Hello there. If the fuel tank is contaminated with debris, it should be either replaced or completely cleaned out. However, the problem with older fuel cells is they are metal, and likely have a lot of rust in the fuel cell; which will contaminate the fuel and lead to the "running like crap" issues. It is also possible that you have an exhaust leak which can create the same type of sound and backfiring problems.
