Skip the auto shop - Our mechanics make house calls

Q: My car keeps giving misfire cylinder 5

asked by on

I've changey3 coils, spark blugs and intake gasket after 20 Minutes the engine light came right back took it to autozone brought back the same code for cylinder N 5. And it's acting like it was never changed

My car has 145447 miles.
My car has an automatic transmission.

A: Hello - when you changed the plug and coil,...

Hello - when you changed the plug and coil, was there oil in the spark plug recess? If so, the valve cover is leaking oil onto that plug and coil, and should be replaced. The oil can enable a misfire by shorting the plug or coil where the oil contacts them. It is also a good idea to replace all of the coils at once.

The diagnostics within the engine management system cannot always discern the differences between new and old coils, and a misfiring coil. Check out the crankshaft position sensor as well. It could be causing the misfire.

I would recommend having a misfire inspection completed by a mobile, professional mechanic, such as one from YourMechanic, to diagnose this problem, get an accurate assessment of damage and cost estimate for repairs.

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

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: My car overheated and when I tried to start it I heard a rapid clicking sound - is it caused by my battery?

Hi there. Anytime an engine overheats, it can cause serious engine damage or damage to other electrical components if the overheating issue was significant enough. Before you decide to spend money on any replacement parts or service, you should have...

Q: I recharged the battery in my truck, but it still won't start.

I would have the battery load tested to see if it is bad. When the batteries get old they will not hold a charge and can not crank the car.

Q: Sensor under intake manifold

Hi there, thanks for writing in about your 1993 Honda Civic del Sol. Your friend was probably referring to a failed MAP sensor. It does reside under the intake manifold and can cause mixture issues resulting in RPM surges. One...

Related articles

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 Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.