Car doesn’t turn over. Replaced spark plugs and wires.

Car doesn't want to start. The starter works, but the engine does not turn over. I changed the spark plugs and wires recently.
Experienced mechanics share their insights in answering this question :
I would have a technician inspect your starting problem because it could be a number of things that would stop the car from starting.

How to Identify and Fix Common car Problems ?

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Check the spark plug wires: Make sure that the spark plug wires are properly connected to the new spark plugs and the ignition coils. If they are not connected properly, your vehicle won`t start. 2. Check the battery: Ensure that your car`s battery is fully charged and in good condition.
The most common reasons a Dodge Neon won`t start are a dead battery, an alternator problem, or failed starter.
Spark plug issues

For spark plugs that don`t spark dependably, it will cause an engine misfire that robs you of performance. Cracked porcelain insulators and worn electrodes are the common issue. If more than one spark plug fails, your engine may not start.

If all that was done was the replacement of spark plugs and wires and nothing else, and if the engine now will not crank, but you only hear “click” when attempting to start, it`s unlikely the ignition parts replacement is involved. You may have a very low battery, a faulty starter, or a failed starter relay.
Hard starts

Having trouble starting your vehicle? While your first thought may be a dead battery or an empty gas tank, bad spark plugs could be the cause. You won`t be going anywhere if your spark plugs can`t produce the spark to start the combustion process.

Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.
Blown Fuse

If there has been a surge, a fuse that controls the fuel pump, the fuel injectors, or another component that`s vital for your car`s functioning, it may be the cause of your car`s failure to start. Unlike most of the other problems, this is one that you can check yourself, if you want.

If the timing belt or chain has broke then you may have bent the valves and the chain or belt will jam up the crankshaft from turning. The pistons will contact the calves and engine will not turn. Try and turn the engine in both directions.
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.

If the relay fails it will cut off power to fuel pump and ignition system, which will result in a no power, and therefore no start condition.
A dead battery is the most common reason why engines fail to start up. A common reason for batteries to fail is drain. Your car`s battery typically expends a small portion of its storage to start your car up, and then recharges from your alternator as you move.
The most obvious sign of faulty spark plug wires is your vehicle just feels a little `off. ` It would probably start slowly with reduced gas mileage but could progress to no acceleration. Faulty spark plug wires or spark plug misfires can also cause problems starting your engine, a rough idle, and loss of power.
Starting the engine after the spark plug replacement is a good way to validate your work. Note: If your Check Engine Light is on, you can drive your vehicle to your local AutoZone store and have the code translated. If the Check Engine Light `flashes` there is a cylinder miss-fire.
The most obvious sign of faulty spark plug wires is your vehicle just feels a little `off. ` It would probably start slowly with reduced gas mileage but could progress to no acceleration. Faulty spark plug wires or spark plug misfires can also cause problems starting your engine, a rough idle, and loss of power.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Engine will not stay started. I have replaced idle control valve map sensor spark plugs spark plug wires no check engine light is
ANSWER : You have a problem with the distributor assembly. I recommend replacing the distributor assembly. This will replace all the possible sensors and coil for the ignition and fix the problem you have.

Spark plug chaos. Rubber stoppers are preventing the spark plugs from coming out.
ANSWER : Hi there. Try using a pair of small needle nose pliers to pull off the rubber boots from the spark plugs. As you pull, twist the rubber boots to break them free. If you cannot get the rubber boots off, then try using some mineral oil on the boots to aid them off, then clean off the oil with soap and water with degreaser. If you need further assistance with removing the boots from the spark plugs, then seek out a professional, such as one from Your Mechanic, to help you.

Just replaced spark plugs and wires and my car is still miss firing and I can’t pin point why and my old spark plug is oil covered
ANSWER : Hello there, many faults will cause your 1988 Ford Contour to have a misfire even after the spark plugs were replaced. When oil is seen on the spark plug this indicates that the valve cover is leaking onto the plugs. When this happens it fouls the plugs and can cause a misfire. Until the oil leak is addressed the spark plugs will continue to become fouled. If the misfire persists there are many potential causes such as the plug wires, fuel pump, vacuum leak, oxygen sensor, MAF sensor, or the cap & rotor. A qualified Technician such as one from YourMechanic will be able to diagnose your misfire fault and make any repairs required to resolve the issue.

After part replacements, spark plugs do not work – 1996 Lexus LX450
ANSWER : If you have a Check Engine Light on, first check for those codes to determine what engine management thinks is going on. If no trouble code, check the ignition fuse behind the driver side kick panel (carpeted panel at foot level on the left – for left-hand drive vehicles). If the engine is spinning quickly, and doesn’t appear to be meeting any resistance (as a motor with good compression would have), you may have a broken timing belt. If so – STOP, call a professional mechanic, like a certified technician from YourMechanic for help.

Car turn over won’t start have new battery starter and altinator and changed spark plug and spark plug wires and crankshaft sensor
ANSWER : Hi there. The first thing I would recommend would be to have a professional mechanic complete a digital scan of your ECU to see if there are any stored error codes that might pinpoint the source of your problem. However, one thing you might want to check yourself is the electrical harness connected to the crankshaft position sensor. In most cases, if this is diagnosed a being damaged, it’s actually the harness that is bad and needs to be replaced.

My car doesn’t turn on, got new battery, changed oil and spark wires and plugs, but when and if it turns on it goes and stalls out
ANSWER : Hello there, many faults will cause your 2001 Honda Accord to have the P0420 code and not turn on. The P0420 code indicates the vehicle has catalyst system efficacy below threshold. This is indicating the car is detecting the cars catalytic converter is not functioning properly or the engine is thought to be running to rich. Common causes of this are a plugged catalytic converter, failed oxygen sensor, leaking exhaust manifold, leaking exhaust, failing fuel injector, or a misfire condition. A qualified Technician such as one from YourMechanic will be able to diagnose your check engine light and car shutting off when driving issues.

My car will not turnover at all! no spark not even does it try to start up i have replaced the distributer starter spark plugs
ANSWER : If the starter motor is not functioning (that is, if the starter is not engaging the flywheel and turning the engine over), either there is no power to the starter or there is power but the starter itself has failed internally.

A qualified technician, such as one from YourMechanic, would first test for voltage (as well as voltage drop) at the starter when you actuate the starting circuit. If no voltage, that is if the circuit is open, the break in the starting circuit is simply traced.

If there is power to the starter and yet the starter will not function, the starter is condemned and thence replaced. YourMechanic can perform these tests to properly diagnose your starting issue right at your location.

My car turns over but won’t start, has no spark, distributer cap/rotor, spark plugs, and ignition module have been replaced.
ANSWER : Hi there. It sounds like the ignition coil has failed causing the no spark issue. The secondary circuit within the ignition coil has either burned up or shorted out. I recommend replacing the ignition coil. If you need further assistance with your no start condition, then seek out a professional, such as one from Your Mechanic, to help you.