Skip the auto shop - Our mechanics make house calls

Q: Miss on cylinder 1

asked by on

Service engine light comes on and my mechanic gets cylinder 1 misfire code on his diagnostic.He's replaced the wire and coil set,new plugs ,and a new fuel injector on cylinder 1.The miss seems worse at startup,as the engine reaches operating temperature it is still there but not as prominent.

My car has 164000 miles.
My car has an automatic transmission.

Hey. You may have excessive carbon build up on the intake valves or a broken valve spring or a sticking valve. Have the combustion chambers cleaned using Ford combustion chamber cleaner and spray or have it sucked into the intake to clean the carbon off of the valves. If you see this improve the problem then you may have to have it done several times to get all the carbon off of the valves. If it does not improve, then have the compression checked to see if the cylinder has a compression problem and a valve spring may be broken. If you would like to have this checked, a qualified pro from YourMechanic can come to your car’s location to diagnose the misfire issue.

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
  1. Home
  2. Questions
  3. Miss on cylinder 1

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: Whine from 2011 f150 drivetrain

Hi there. If the replacement transmission you installed was used, it's quite possible that some component inside is damaged as well. However, it is more likely that the initial diagnosis is incorrect if you are still hearing this pining sound....

Q: Mushy brakes in 2000 Ford Taurus

If the brakes feel mushy after sitting for a long period then you may have some moisture or air in the brake system. You should have the brake pads checked and serviced as needed if they are worn. You may...

Q: brake lights will not come on

If the center (high mount) light is out as well, it means that the circuit is "open" somewhere. There could also be a large voltage drop (i.e., high resistance) somewhere in the circuit that has caused the voltage to fall...

Related articles

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 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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...