[woodman2009]

symptoms: rough idle, engine light on and blinking. I hooked it up to a dianostic tool and came up 12 codes....P0300 (random misfire), and the others are individual cylinders listed as misfiring....all except cylinder 4. I change the spark plugs...still the same. it has 44,000 miles on it. Any ideas how to fix???

[Itemtrader]

Did you just change the plugs ?. Try doing a whole tuneup - You know the wires and the rottar. You may try test the coils two. Its probibly soemthing simple.

[mech1red]

i have same problem changed timing belt plugs checked all 6 coils fuel press is 60. only code is random miss fire i dont know either....

[ljh]

Just had the same thing on a 2003 Accord EX V6. Changed spark plugs and got no change. Parts store said I needed to change out the 6 Ignition Coils. (This car does not have spark plug wires but instead has Ignition Coils that cost about $45 each. So, I purchased only one (1) Ignition Coil, per an earlier post on this forum. Changed one coil at a time until the problem was solved. Then to get the blinking Check Engine light to go out, I removed the Positive battery cable for a minute or so. Blinking light is gone.

[kenithparker]

Hey you can type this on you tube and find related videos for this process, which will be very helpful for you and also you can do by watching that video.

[kristinthomas21]

When the diagnosis methods P0300 code, it is important to record the freeze frame data and then repeat the code with the conditions set for the test drive. Pay attention to the engine load, position, RPMs, and speed through the P0300 (which is a special break) can sometimes be difficult to detect.