Will not start
Tried to jump off and nothing happens will not turn over or any thing new battery alternator and new starter what else could it be
My car has 200000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
The anti theft system may be engaged causing the no start. Look on the dash to see if the theft light comes on then goes out when turning on the key. I light stays on then theft system is engaged. You will need to have the PATS system tested using a compatible scanner that can access the PATS system to see if keys need to be reprogrammed again to start the engine. You may have a bad transponder key or sensor in the steering column.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
If the security or anti-theft light is flashing when you attempt to start your car, and the engine does not crank or does not start, you have an anti-theft problem. The system may not be recognizing your key or keyless entry signal, or there may be a fault in the anti-theft module, keyless entry system or wiring.
If your engine has been locked up by the anti-theft system, you will be unable to start the vehicle.
The most common reasons a Ford F-150 won`t start are a dead battery, an alternator problem, or failed starter.
If there isn`t a dedicated anti-theft fuse, gently remove any fuses connected to the ignition system using a pair of tweezers. The security system of the car will frequently become deactivated as a result. Reinstall the fuses after a short while, and your car should start normally.
One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.
Yes, most anti-theft systems are equipped with a fuse that can be found in the fuse box of your car. It is important to check the fuse before attempting to disable the anti-theft system, as a faulty fuse can prevent the system from working properly.
Passive anti-theft systems
Passive anti-theft devices include: An alarm system that activates automatically when you turn the ignition off or shut your car door. Automatic disabling devices such as a computer chip in the ignition key. This device will prevent the car from starting if an unrecognized key is used.
Some Security Systems for Cars Will Drain the Battery
The wiring to the alarm on these systems goes directly to the battery, and they will slowly take away energy from the battery. Eventually, this can lead to the failure of the battery. It generally happens later in the life of a battery.
Why won`t the Ford F-150 start when it clicks once? The cause is usually a dead battery. You could also try turning the steering wheel from side to side, then starting it again. Also, check the battery terminal connections.
If your ECU controls the anti-theft system, disconnecting the battery may lock you out of your car. Like desktop computers and most other electronics, disconnecting the battery cable for a short period will not fully reset your ECU due to the residual power remaining in the circuits.
You`ll see the anti-theft light flashing if the security system has been triggered, so always check for that indicator light before panicking. Under normal conditions, the security light will turn on briefly when your ignition switch is in the on position, but it should turn off afterward.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Fuel pump engages. Batery good, alternator good volts, jump start helps when wont start. Temp does not matter. Intermittent?
Hello. Thank you for writing in. There are several reasons your vehicle may only start when jump starting. The first and most common is a build up of resistance that is causing you to need a boost of voltage to get the engine started. This may be due to poor battery cables, a bad ground connection, a poor starter solenoid, and a couple of other issues. The first thing you want to do is perform a visual inspection of the starting system. Make sure there is no corrosion build up in the battery cables. You can also check the resistance across these wires and make sure you have a solid connection between components. You then want to make sure the starter solenoid is doing its job. It is responsible for taking the small amount of electricity sent by the ignition and turning it into a huge electrical charge that is strong enough to push over the engine with the help of some gear ratios in its favor. Do some more testing, and stick to the basics before assuming its something seriously complicated.
Vehicle won’t start, once it’s jump started it only stays running until you turn it off, then it work start again without jumping.
Hi there. There could be two problems here. It is possible that your battery is bad and will not take a charge from your alternator while driving. In that case every time you shut your car off you will not have enough juice to start it again. Inspect your battery – it should have at least 12.5 to 13 volts to start your car, if it doesn’t you will need to replace the battery. The second problem could be that your alternator is bad and not charging your battery, in this case you will need to replace your alternator. Both the battery and the alternator can be tested in your car. If you would like to have the car checked for you, a certified professional from YourMechanic can come to your car’s location to diagnose the starting problem and proceed with repairs.
Cranks over start than dies
The idle air control valve is a small valve on the engine’s intake system that reads the air intake as it comes into the motor. This is controlled by the car’s ECM which uses this information to make adjustments to the air/fuel ratio depending on various inputs such as outside air temperature, intake air temperature, load and various other things. As you accelerate, your car’s engine is receiving a much higher dose of fuel than when at idle and conversely, when you let off the gas pedal, there is a sudden change in this fuel supply as a result of your foot letting off the pedal. When this happens, the job of the idle air control valve is to bring this deceleration down to a slow and smooth idle rather than suddenly cutting off the fuel supply causing the motor to die. When the idle air control valve is not working properly, this cause a disruption in this process resulting in the engine not being able to idle properly. I would recommend having a professional come to your location to diagnose and inspect your vehicle.
Why does my car struggle to start every 4th to 5th time?
It sounds like your starting issues may be linked to a problem with air metering or fuel delivery. A clogged or malfunctioning idle air control valve may show some of the same symptoms you are describing. The idle air control valve can be stuck in a cold start position which may work well if the car has been sitting a few hours, but as the engine warms up there must be a regulation in airflow. Consider hiring an experienced technician like one from YourMechanic who can come out for a closer look at your hard start situation and offer a more personal diagnosis.
Car was sometimes not starting, not even cranking when i turned the key then after a few times itd start. Now it ont start at all
Without being there to inspect your vehicle, or having information about what type of car, truck or SUV you own, it’s very hard for us to give you some advice. You might want to have a professional mobile mechanic complete a car is hard to start inspection; so they can come to your location and determine why your vehicle is having these issues.
When I start my car it doesn’t start after the jump start it started but later it didn’t and the battery was last replaced on 9/2012
As you may know when jump starting the car, the battery power provided is being supplied form the other car you are using to jump your car with. If the car does not start following the jump, this would suggest your battery may be dead and needs to be replaced. If the battery was last replaced in 9/2012, it is most likely time for a new battery as that is a decent amount of life for a battery.
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
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.
My Blazer will crank over but not start by itself. It needs starting fluid to start.
Hi there. If you have not replaced your EGR valve, mass air flow sensor or the TPS on your Blazer, you might want to start with these repairs. It is also possible that the throttle body itself is damaged, especially if you’re able to start it on fluid. If you want to avoid chasing parts and repairs, the best solution may be to have a professional mobile mechanic come to your location and complete a car is hard to start inspection.