Motor Vehicle Maintenance and Repair Stack Exchange
Motor Vehicle Maintenance and Repair Stack Exchange

Questions tagged [ignition]

For questions related to the process and components that generate the spark that ignites the fuel-air mixture in gasoline engines.

The electrical system that handles the spark component of the ignition process in gasoline engines. Ignition systems are comprised of but not limited to ignition coils, ECU, signal generators, spark plugs and wires, distributor mechanisms, points, condensers and sensors.

Ignition System Diagram

enter image description here

392 questions
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What Color Should the Spark Be When Using a Spark Tester?

If I'm using a spark tester with an adjustable gap set to the correct gap for my car's ignition system voltage, what should the spark look like? I ask because I've seen conflicting opinions on this matter. For example, this Brigg's and Stratton…
Robert S. Barnes
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Car won't start, lights and electronics flicker

Ford Focus. When i turn the ignition, the engine will not start. The lights and electronics will flicker while i am turning the ignition. I do not hear the engine "turning over". What is my issue? If i can resolve the issue myself with something…
prolink007
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Prolonged ignition

My car, Megane '98 1.6e Petrol Hatch, started to take a long time to ignite. At first I thought that the fuel does not reach the chambers because I always have to park it in places with big incline, but I think it's actually related to the fact that…
Aleksandar Savkov
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Explain the sound of a car's ignition?

A normal, working car, nothing wrong with it, makes a very distinctive sound when you turn the ignition. I have a vague understanding of a distributor spinning around real quick and firing the spark plugs, but I don't really grasp what's making the…
temporary_user_name
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What is a TACH LEAD?

What is a TACH LEAD on this picture?
Heniek Kowalski
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How do I start my 2016 CX7 Mazda if my ignition device battery dies?

How do I start my 2016 CX7 if my ignition device (proximity key) battery dies?
user54102
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1997 Plymouth Voyager (U.S.) Ignition Cylinder R&R

Attempting to replace the ignition key cylinder. Attached are the instructions and photo's of the Voyager we're trying to replace the cylinder. I just don't see any access to the "cylinder release tab" or the "retaining tab" (same thing.) Do…
JoeFromOzarks
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Can I program a new aftermarket FOB for 2005 Mercedes benz c320?

I recently bought a 2005 Mercedes benz c320 at an auction and when I went to pick it up, I was informed that it did not come with a FOB due to the fact that the previous owner had not turned it in when the car was appropriated by the insurance. When…
Michael Negoi
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Do Distributor Caps need Regular Replacement?

Does the rotor physically contact the points in a distributor cap and cause them to wear down such that the cap would need replacement at regular intervals?
Robert S. Barnes
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Coleman CT200U-EX-Will not start

Started up fine the first few times but when you hit the throttle it went wide open and when you let off the throttle it stayed wide open, so my son had to hit the kill switch to stop it. After doing this about 5 times it would not start back up. I…
Bob
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2012 Chevy Malibu ignition switch

I bought a used ignition Switch and got it put on. Do i still have to program that? Or it should work because it was programmed before? I need help
MasterMind46
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help diagnosing intermittent non start and cut out

Car sometimes starts, sometimes not, and also cuts out during driving, I’m assuming this is due to same cause. Mechanic said there is fuel starvation and perhaps fuel pump is not working and that I could only change part and see if it fixes issue,…
James Wilson
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Wasted spark ignition spark plug type

I have a couple of follow up questions on wasted spark ignition: I heard wasted spark igniton systems are hard on spark plugs. How does wasted spark compare to say COP ignition and do wasted spark ignition systems require special spark plugs that…
B. Morgan
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Fiat uno fire 1100

I'm having trouble with my car not starting. I bought a new coil and a new module, and cleaned the distributor, but I'm still without luck. What else can it be? And then I want to know on your coil you have the middle wire which is the ignition wire…
eddie
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Relation Between RPM and Spark Advance

It's my understanding that under normal operation spark advance is directly proportional to RPM, i.e. as RPM increases so does spark advance due to the need to ignite the AFM earlier the quicker the piston is moving. So I was somewhat surprised when…
Robert S. Barnes
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