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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....
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...
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
Jeep won't turn over after sitting for 8 hours 2001 Jeep Cherokee
Hello - I would first check the battery cables and ground straps for corrosion, or other poor-connectivity problems. A strong battery can be hampered by poor connections, which will sometimes finally pass current. A failing starter solenoid (burned contacts) will...
Question
My 97 yukon turns over but doesn't start I took the fuel pump it's not that
You will need to have the computer scanned to see if you are getting a crankshaft and camshaft sensor signal and giving the ignition spark. If not then replace the sensor that is not giving the signal so your engine...
Question
Wheel is free but the key won't turn
You should try a different key if you have a spare one to try. If the spare key turns the ignition now then the original key is worn and needs replaced.If you do not have an extra key then look...
Question
Can you put a Mazda ignition switch in a Honda
Hi there. Switching the ignition switch depends on the year of the vehicle. Older Honda's and Mazda's could swap out the ignition switch together, but the newer vehicles cannot as they are coded for each vehicle by VIN number. If...
Question
1970 chevy silverado cranks but will not turn over
With this ignition system you most likely have issues with the ignition coil or the ignition module. Before this you will need to check to make sure the ignition cap and rotor are not burnt and need to be replaced...
Question
2000 escalade will not lock with the key in the ignition, it only chimes and doesn't engage lock.
Hi there. If the driver door is not locking with the door ajar and the key in the ignition, that is normal. If all of the doors are not engaging the locks with the key in the ignition and the...
Question
I have a 93 chevy astro and im not getting spark to from my ignition coil
There is a problem on the primary side of the ignition circuit. If your distributor was not replaced and contains a Hall effect pick-up assembly that can be tested using a self powered “indicator light” that is made for this...
Question
I changed the cap,rotor, and spark plugs. now my dodge ram 2500 5.9L. won't start it's trying to turn over but won't. what is this
If the vehicle was starting fine before you replaced the cap and rotor and spark plugs then you need to go back to your installation of the plug wires on the distributor cap. You may have put them back on...
Question
I have 2001 Jeep Grand Cherokee it runs and shut off while driving.I change the spark plug and ignition coil and and clooged exhau
When the engine will not start then you will need to verify if you are losing fuel pressure or losing ignition spark. You may have a bad fuel pump or crankshaft sensor. Have the computer scanned to see if you...
Question
Rewired my spark plugs 4-1-5-2-6-3 all correct. When I turn on the truck it sounds normal the first 2 seconds then it starts sound
The firing order for this engine is 142536 and not 415263. You need to correct this and then the engine may run better. The order is clockwise 142536.
Question
2006 Honda Civic Dx won't accelerate over 20 mph...Checked codes says it's a misfire change plugs and found oil in well...Plz Help
To start you will need to replace the valve cover gasket and clean out all the oil out of the spark plug tubes. Then you will need to replace every coil boot that got oil on them. Once this is...
Question
I jumped my 2008 Cadillac CTS and now there is not power.
Hello. The first thing I would do is check the fuses. If there is one blown fuse then there may be many more. The only time a fuse will blow is if the jumper cables are installed backwards. If the...
Question
Why would one cylinder not get spark on my 1998 Ford Escort
Hello. If you are getting good spark out of the other 3 wires and not that one in particular then that is typically a coil issue. Your ignition system uses the waste spark method meaning two plugs always fire together,...
Question
69 mach 1 428 fires in start position dies in run position, runs with jumper wire to + side of coil
It could be that you need to replace the breaker points. Many of the older cars had a ballast resistor built into the ignition circuit to lower the voltage to the points. Often the Ignition switch was wired to bypass...
Question
Sometimes while driving my 1999 chevy c1500 everything will cut off and instantly come back on all electricity. All the dash light
This sounds like an electrical short or loose connection. Make sure the battery terminals are clean and tight. Also check the other ends of the battery cables. The positive cable should run down to the starter. Make sure those connections...
Question
My car twice out of 4 times today would not start on the first time. Second time started fine. At 2 read lights it was sort of je
Hello, thank you for writing in. Your symptoms point towards an issue with fuel or spark. If you just had work done on the fuel system, you may wan to have your fuel pressure tested at the engine. This will...
Question
Would an ignition cylinder from a 99 4Runner fit a 91 4Runner?
Generally, a switch assembly from 1989 through 1994 will work on this vehicle, but to get a precise answer if you plug in your vehicle data on-line at Car-Part.com you will get not only all possible interchange years but you...
Question
'72 Mach 1 with 351C. Runs, idles, revs in park. Sputters, chugs and coughs in Drive. Any suggestions?
Check for proper advance of ignition timing. In particular, verify that advance curve you observe matches factory spec. Measure fuel pump output/pressure against factory spec. If engine compression is good and balanced, apart from timing check and fuel pressure check,...
Question
I changed my spark plugs and ignition coils and now my car wont start it just clicks i have a 2002 jaguar s type v6 3.0
Hello, thank you for writing in. There are several issues that may have occurred. The first step is to make sure the ignition wires are installed correctly, and that you did not mix up the firing order. You can do...
Question
1999 Ford Ranger 2.5L. #3 and #4 cylinders are not firing, #2 sometimes doesn't fire.
You should first check the fuel pressure is within specification. Then check plugs are getting fire and then do a compression test on all 4 cylinders. If all this is normal then remove injectors to look for clogged injector inlet...

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