Skip the auto shop - Our mechanics make house calls

Q: No spark on cylinder 1 and 4

asked by on

I've been working on my car the past week, and it’s not sparking on cylinder one and cylinder four. So I changed the coil, camshaft sensor and crankshaft sensor. But now I'm not getting any error codes, and it's still not sparkling on those cylinders. Do you think the Powertrain Control Module is shot? Do you have any ideas?

Before considering the replacement of the PCM, return the coil pack to the parts store and ask for it to be tested. It is not uncommon to receive a faulted new part. Spark has to travel from the coil, through a wire and to a spark plug for each cylinder so each it is possible that there can be issues at any one of these components when you are considering spark problems. I recommend that you have another certified professional, like one from YourMechanic, come to your home or office to diagnose the ignition system and pinpoint the faulty components before proceeding with repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: 2012 chrysler twn cntry wont start lightning bolt on dash

Hi Matt. Thanks for contacting us today. If you turn the key and the starter is activated, causing the engine to turn over - but it will not start, this could be due to a few different sources. Either fuel...

Q: Check engine light still on after repair. 2006 Infiniti G35

Hello. If the Check Engine Light remained on after the battery was plugged in, then it may be possible that the issue is with the wiring. Faulty wiring or a bad connector to the cam position sensor keeping the Check...

Q: Key not turning to start the car.

Hi. It is likely that the thief did a irreversible to the steering column and ignition switch. The only thing that could fix the potential damages is to replace the components all together. I recommend having a trained YourMechanic technician...

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...