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ignition system

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How to Troubleshoot a Car That Won't Turn Off
If your car won't turn off, inspect the power relay, idle speed, ignition timing, and spark plugs. Using premium fuel may help but isn't a solution.
How Long Does an Ignition Trigger Last?
In order to crank a car, there are elements of the electrical and the fuel system that have to work together. As the car key is turned over, the ignition coil will...
How to Install an Ignition Switch
When your ignition switch fails, it can cause a number of different issues. You may experience anything from a failure to start, to a stalling problem, to a series...
How to Unlock a Steering Wheel
When your steering wheel locks it is usually at the worst time. The good news is that it is an easy fix. The steering wheel locks for many...
How to Start a Diesel Truck
Starting a diesel engine is a lot different than starting a gas-powered engine. Whereas a gas engine starts when the fuel is ignited by the spark plug, diesel...
How to Remove, Install, and Adjust Ignition Timing
Ignition distributors help spark the gas and air in the engine. Worn distributors need to be removed to be cleaned to maintain proper ignition timing.
How to Test a Spark Plug Ignition Coil
An ignition coil is a vital component of today’s modern engine management system. Virtually all vehicles manufactured today use ignition coils to provide the spark for the engine’s spark plugs. An ignition...
What Does the Ignition Switch Warning Light Mean?
The ignition switch warning light could mean there's an issue with the ignition system or the car key. It could be due to a glitch or worn out key.
How to Start a Prius
The Toyota Prius was a game changer when it was first introduced back in 2000. As one of the first commercially successful hybrid vehicles, it eventually helped launch an...
How to Replace an Ignition Relay
Common signs of a damaged or broken ignition relay include a low/dead battery, the car stalling or not starting, or loss of power to the dash lights.
How to Replace the Electronic Spark Control Module
The car ignition has an electronic spark control module that fails when the Check Engine Light illuminates or if the engine does not start.
How to Replace an Ignition Lock Assembly
An ignition lock assembly can fail from constant use or broken keys inside the tumbler. To replace it, all you need are some tools and a new cylinder.
How to Replace an Electronic Ignition Pickup
The electronic ignition pickup is part of the ignition distributor. Signs of failure include intermittent misfiring or failure all at once.
How to Replace an Ignition Trigger
The ignition trigger fails if the engine is misfiring or has trouble starting. The check engine light may illuminate if the ignition trigger fails.
How to Replace an Ignition Lock Cylinder
The ignition lock cylinder is usually at fault if there is an issue with the ignition system. A common sign of failure is a car that won't start.
How to Replace an Ignition Ignitor
The ignition ignitor sends a signal to supply power and start the engine. A common sign of failure is a disruption in the engine's starting process.
How to Adjust Timing on a Car
A well timed ignition will allow the engine to run powerfully and efficiently. The timing needs adjustment when the engine runs too lean or too rich.
How to Replace a Ballast Resistor
The ignition coil cannot get proper voltage if the ballast resistor is broken. Signs are a crank without a start or a start and an immediate stall.
How to Replace Ignition Cables (Spark Plug Wires) in Your Car
The ignition cable, or spark plug wire, carries a signal from your vehicle’s computer to the spark plugs. This is crucial to the ignition system.

Related questions

Question
Wont start after leaving the key on all night.
Hi there. Check the battery cables and see if the are tight and clean. A loose battery cable can cause the power to come on but not turn over the starter. If the battery cables are tight, then check the...
Question
Key is stuck in ignition so i think its causing the battery to keep going dead
Hello there, many common faults will cause your key to become stuck in the ignition in your 2006 Chevrolet Aveo. When the key is in the ignition and turned this puts the vehicle into the on mode, which will drain...
Question
Ignition replacement 2004 Jeep Grand Cherokee
Hello - the new keys and the security transponder which reads them must be programmed to be "in sync" with each other. You may also find that holding one of the old keys near the dash, while turning the ignition...
Question
Bad ignition switch or main relay?
Many of the 1998 Accords were recalled by Honda for ignition switch and interlock defects. In your circumstance, the first thing to do is confirm whether applicable recalls affecting your vehicle were in fact completed, by you or any prior...
Question
I have a 2012 Mercedes blutec and when I push start didn't want to come on but the radio and lights... What is the problem?
Hi there. The ignition system could be locked out by the security system or the ignition switch has failed. Look at the security light and see if the light is flashing quickly and see if the light stays on when...
Question
My key will not easily come out of the ignition on my 2011 Mercedes C300
Hello. If the key will come out then you have an issue with the key lock sensor in the shifter assembly. It is not uncommon for the shifter assembly to break internally or to become warped and make poor contact,...
Question
Car sometimes doesn't start when the key is in the 'ON' position and when turned there is absolutely nothing happening.
Hi there. There is an issue with the ignition switch and it needs to be replaced or the wiring to the ignition switch is damaged in the steering column. If you vehicle has a tilt steering column, change the tilt...
Question
Lock ignition cylinder
You will need to inspect the damage that was done and if the key cylinder is all that is damaged or the housing that the ignition lock cylinder goes in to. You will also need to have the theft sensor...
Question
Truck runs fine most of the time but sometimes when its raining it won't crank and there is no noise at all.
Hi and thanks for contacting Your Mechanic. For the no start situation that you are encountering, check the wiring to your starter and make sure that the wires are tight and clean. If the wires are clean, then check the...
Question
Car has no power unless key is turned to the on position. When off interior lights nor head lights work
Hi there. Check the fuses to the vehicle and see if any of them are burned. If the fuses are burned, replace them and see what circuit they were in to do a diagnostic troubleshooting if the fuse burns again....
Question
Fan blower and DRL stopped working when my ABS light came on?
Hi there. The only thing that could cause the issue that you are having is a failed ignition switch. I recommend replacing the ignition switch and program new keys to the switch. I recommend seeking out a professional, such as...
Question
1984 F-150 will crank but won't start until you let off the key.
Hi there. What has happened is that the wiring on the ignition switch is hooked up wrong. The following are the terminals on your ignition switch: Battery 'BAT' ON 'ON' Accessory 'ACC' Ground 'GND' The wire from the...
Question
Celiac 2003 doors unlock right after I lock them.
Hi there. Check all of the door lock switches on the door jams. If a switch is not functioning correctly, then the doors will not lock. If all of the door lock switches are working good and there is nothing...
Question
Won't turn over every turn of the key
If the ignition switch itself is defective that could implicate Code P0310, as suggested by the below list of causes (which list includes the ignition circuit) of that code setting. You seem to be describing a circumstance where electrical contact...
Question
Electrical Issue/It is not the recall.
Hi there. There is an issue with the ground to the light switch or the light switch is not working to make the lights flicker. The radio and the hazard lights are on different circuits, so they will not cause...
Question
Cranks but won't start.
Hi there. It seems that the transmission position sensor / switch has a contact issue within it. Remove the harness from the transmission switch and see if there is any moisture on the plug. If there is moisture, then you...
Question
Do I need a whole new ignition or just the ignition switch?
You will need to have the damage to the ignition lock cylinder housing checked to see if just the lock cylinder can be replaced if no damage to housing was done. You will need to have the door and trunk...
Question
Error code p0300
The diagnostic trouble codes that you have listed are all related to a misfire condition. The P0300 is a random cylinder misfire, while the last number on the other three codes you listed, are for the cylinder where there is...
Question
When I turn ignition off and pull key out, car doesn't shut off. when i can shut it off, next morning battery is dead.
Malfunctions in the EGR (Exhaust Gas Recirculation) system would not affect the ignition system or battery. If the EGR system has a fault, the service to request is EGR system diagnostic/inspection. If your vehicle engine continues to run after the...
Question
I am not getting any power when I turn the key to the on position. there is no dash lights only check engine lite comes on.
The problem of having erratic electrical issues with this year Bronco they have problems with the ignition switch losing contact. You should check and replace the ignition switch. When the switch is removed you should check linkage rod and electrical...

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