1999 Honda Accord LX Automatic with Vtech 6 cylinder

1999 Honda Accord LX with Vtech 6 cylinder



Help .. need some advice.



Maint Light on . DTC codes are



P0303 Cylinder 3 Misfire Detected

P0305 Cylinder 5 Misfire Detected

P0306 Cylinder 6 Misfire Detected

P0300 Random/Multiple Cylinder Misfires Detected





Any hints . suggestions . possible/probable causes that anyone knows of?



Any and all assistance will be greatly Appreciated.



Bill

 

How many miles are on this car?

Do you follow the maintenance schedule to the letter? For
example, when were plugs, wires, distributor cap, fuel
filter, and air filter last changed? Have you been using
strictly OEM (= genunine Honda) parts?

anyone knows of?

 

Not quite 100K. All maint was done within a couple hundred miles of when it
was supposed to be and only used the best materials.

 

I can only guess at what "best materials" means. If the
plugs, ignition wires, distributor cap and rotor aren't OEM,
I'd replace them.

I'd check the timing. Then I'd do a test of the distributor
coil.

Keep checking back.

 

Bill,
I suggest that you (or a mechanic) conduct a compression check of each
cylinder. I also suggest that you take the vehicle to a mechanic and have
him or her use a "Diagnostic computerized engine tester" to track down the
source of the problem. This might be cheaper than replacing various parts
that may not be defective.
This might be a great time to get a complete tune up. I should note that I
am not a mechanic but when I was younger I was a "back yard
mechanic"--minor repairs only due to the lack of equipment.
Jason

 

Dropping off at the mechanic tonight.
Hoping it is something simple...
.... and inexpensive.

Hoping it is NOT compression ...

Thanks

 

Compression doesn't come to mind. I think it will be ignition... with the
most likely being tune-up stuff. That isn't "inexpensive" on any modern car,
but it is at least affordable enough.

Mike

 

Mike,
You might be right. One reason that I mentioned a compression check was
because only some of the cylinders were mentioned in the original post.
That could be a sign that there is a compression problem with those
specific cylinders. I hope that I am wrong.

 

Don't take this wrong but I hope you are wrong and Mike is right ... Tune
up stuff not cheap but a LOT cheper than cylinder work.

BTW .. I only mentioned cylinders because the readout mentioned cyclinders
.... as in 3 of the 6 misfiring.

Will let you know.

Bill

 

Bill,
I don't like to be proved wrong. However, in this case--I hope that
I am proved wrong since "tune up stuff is not cheap but a lot cheaper than
cylinder work". However, if the "tune up" does not solve the problem--the
compression check should be done to rule in or out cylinder problems.
Please let us know--I hope that the tune up
DOES solve your problem.
Jason