Q: Cylinder 4 misfire - 2004 Ford F-250

asked by on

I have misfire in cylinder 4 which is passenger side closest to the firewall. I purchased the tool to remove the spark plugs because I know that these 3v fords are problematic with the 3 piece spark plugs and am no fool when it comes to doing basic tune up work but I have never worked on one of these myself and would just like some professional advice

My car has 158000 miles.
My car has an automatic transmission.

Hi there - yes, these plugs, and their cylinder heads, have proved to be a bit tricky. First tip is to replace the plugs with the engine warm. Second tip is to use one of the "deep sockets" specially made for these plugs (or rent one from your local parts store). Third - some techs have found that removing them with an electric impact wrench (3/8" drive - not the truck lug nut variety) helps break the threads loose without damage. When reinstalling , a touch of anti-seize on the threads is always a good idea.

If you decide not to do this yourself, I would recommend having your spark plugs serviced by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Cylinder 4 misfire - 2004 Ford F-250

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: Misfiring on a 2003 Audi A4 3.0

You've got to replace the cover gasket valve that's leaking oil in the spark plugs. But that's not going to get it to run better right away. But I would change that. If it's running poorly, it's not going to...

Q: I accidentally got synthetic oil instead of regular motor oil and only put in quart and a half. Will it mess up my engine?

Hi there. Today's synthetic oils are much different than in years past, so accidental mixing like you've described is not as damaging to the engine as in years past. However, I would recommend having the oil changed sooner rather than...

Q: Not getting fire on passengers side

Hi CW. Thanks for contacting us today. In most cases, when you are not getting any spark to one side of the motor, it's due to a failed coil, distributor or as you've indicated - an engine harness. If you...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...