2000 Ford Taurus P0304 Misfire

2000 FORD TAURUS
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RICHARD BEE
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  • 1 POST
My 2000 Taurus has 124,000 miles and I am getting a P304 code. The car has a coil-on-plug ignition system. I had a major tuneup at 105,000. To date, I have replaced the spark plug and the coil. I disconnected the battery when when I replaced the parts and therefore reset the computer to hopefully get rid of the service engine light. However, I'm still getting the service engine light and I can feel the car miss ever so often and then I get the service enginme light back on. Soemtimes the service engine light goes off other times it stays on. I used a Autolite spark plug and a Borg Warner ignition coil.

Any help on what else could be wrong?
Feb 15, 2006 at 5:51 AM
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PEPPERMRJ
  • ✓Experienced Mechanic
  • 1,158 POSTS
code P0304 may mean that one or more of the following has happened:

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer


Check the connection for the injector. Run some injector cleaner thru a couple tankfulls. I like chevron with techron myself.
Feb 15, 2006 at 12:26 PM
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Suggested Repair

Check the fuel injector connection on the misfiring cylinder and run a quality injector cleaner, such as Chevron with Techron, through a couple of tankfuls. If the P0304 misfire continues, inspect other possible causes including the oxygen sensor, fuel injector, exhaust valve, catalytic converter, compression, and the computer.

Conversation Summary

The owner of a 2000 Ford Taurus with 124,000 miles reports a P0304 code and an occasional misfire after replacing the spark plug and coil-on-plug coil and resetting the computer. The service engine light returns and the miss continues. The expert lists possible P0304 causes and recommends checking the injector connection and running injector cleaner through a couple of tankfuls.

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