Q: Spark plugs in car incorrectly

asked by on

I replaced the spark plugs and they are in incorrectly. The car won't start, and is backfiring through the carburetor.

Have a trained mechanic verify the work done to the spark plugs, and make sure they are in tightly. It is common to get the wires crossed, which could lead to the wrong cylinder being fired at the wrong time. A trained mechanic can go back over the work and find the mistake, or diagnose the cause for your car not to start. Consider our experts here at YourMechanic, as our mechanics come to you and help to avoid tow bills.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Spark plugs in car incorrectly

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Won't hold idle - 1999 Ford F-150

Hey there. This may be a sign of a dirty or failing idle air control valve or potentially an intake air leak. The idle air control valve monitors the air intake as it is mixed with fuel as it gets...

Q: '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,...

Q: Hello I have a 1978 Chevy four-wheel-drive. I completely tore it down and restored it and put everything back together, but the dash lights are not working properly.

Hi there. It seems that the dashboard lights are grounded to the turn signal switch circuit. This will make your dash light come on when they are not to come on. For the indicator light staying on issue is the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...