How Can Problems with the Ignition System Cause Misfiring? | YourMechanic Advice

How Can Problems with the Ignition System Cause Misfiring?

Misfires are never good, and they're always a sign that there’s a problem with the engine that needs to be repaired. The problem won’t “go away on its own” and waiting too long can cause the situation to grow increasingly worse. Problems with the ignition system can definitely cause misfiring, and they can do so in a number of ways.

The ignition system is responsible for igniting fuel in the engine's combustion chamber. If the system isn’t working correctly, the engine will misfire on one or more cylinders. Generally, only one cylinder is affected, but this isn’t necessarily always the case. What’s more, you may have misfires and not even know it, as wear on the ignition system components is gradual and mild misfires can be undetectable (although your Check Engine Light may come on, seemingly for no reason).

There are several potential ways that your ignition system problems could translate to a misfire:

  • Worn Out Spark Plugs: If your plugs are worn out, then the electrodes have gotten too short to provide the right amount of spark. This is a gradual process, and is the reason that you need to replace the plugs on a regular basis. If the wear becomes extreme, it’s possible that one or more plugs won’t fire at all, causing a misfire in the engine.

  • Damaged Spark Plug: Spark plugs are exposed to high heat and electricity, as well as vibrations. This can cause damage. If the ceramic insulator around the base of the plug is cracked or broken, it can cause a misfire.

  • Damaged or Failing Spark Plug Wires: If your car has spark plug wires (not coil packs), then the wires may be the source of a misfire. If the insulating coating on the wire has been compromised, it’s possible that the bare wire is touching a metal component in the engine and shorting out. This will cause a misfire. Another potential problem is an internal break in the wire – the charge won’t reach the spark plug and a misfire will result.

  • Dirty Spark Plugs: If a spark plug is fouled with carbon or oil, it may not spark properly, causing a misfire. This isn’t really an ignition problem, though. You’ll need to determine the cause of the carbon or oil buildup and repair it.

Problems with your ignition system can easily cause misfiring, but there are many potential causes. If your engine is misfiring, it’s vital to have the problem diagnosed and repaired by an experienced mechanic.


Schedule Engine is misfiring Inspection
Service Area

$79.99 - $89.99

Price range for all vehicles
Average rating from 333 customers who received a Engine is misfiring Inspection.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Excellent Auto Repair Ratings.

4.2 Average Rating

Auto Repair

Service Hours

7 AM - 9 PM

7 days a week

Phone Number

Phone Hours

Mon - Fri / 6 AM - 5 PM PST

Sat - Sun / 7 AM - 4 PM PST

Address

We come to you at no extra charge

Guarantee

12-month/12,000-mile warranty

Service Area

Recent Engine is misfiring Inspection reviews

Excellent Rating


YourMechanic Engine is misfiring Inspection Service

Average Rating

4.9/5

Number of Reviews

333

Rating Summary
311
10
3
3
6
311
10
3
3
6

Jeremy

19 years of experience
392 reviews
Jeremy
19 years of experience
Cadillac CTS - Engine is misfiring - West Palm Beach, Florida
Unfortunately Jeremy had to deliver the news that my car was beyond repair. But he was professional about it and checked if there was any possible way to fix it affordably. He seem honestly distressed telling me something that I already expected.
Honda Pilot - Engine is misfiring - West Palm Beach, Florida
Very thorough and identified the problem in my 2007 Honda Pilot with almost 260,000 miles. He was on time, worked quickly and found the problem. No overselling.

Travis

12 years of experience
425 reviews
Travis
12 years of experience
Oldsmobile Alero - Engine is misfiring - Saint Paul, Minnesota
Travis allowed me to watch the trouble-shooting and resolve of my Alero. He was totally honest, forthright, and completed the repair within two hours. Travis was my second estimate and, comparatively speaking, wins the medal of honor! Thank you, Travis!
Ford E-350 Super Duty - Engine is misfiring Inspection - Saint Paul, Minnesota
Travis was a great diagnostician and also wise enough to know when not to do something he wasn't equipped for. I feel better talking to my regular mechanic now that I know what the problem is and how much I can expect it to cost. Will call Travis again when the need arises!

Chuy

13 years of experience
202 reviews
Chuy
13 years of experience
Mazda 6 - Engine is misfiring Inspection - Chicago, Illinois
Chuy was polite and personable. I really appreciated how he diagnosed the problem , suggested the quality of part that I should purchase and completed the repair. I was dreading the worst case scenario but he assured me that was not the case. I give Chuy the highest recommendation!

Mario

6 years of experience
79 reviews
Mario
6 years of experience
Jeep Grand Cherokee - Engine is misfiring - Colonial Heights, Virginia
Very friendly and professional, good knowledge of issues, and was very patient with explaining it all to me, highly recommended...

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE