Thank you all for your advice & wisdom.
I did a two step replacement of the Plugs & Plug Wires. I purchased plugs
and wires from Autozone. The more expensive ones.
The next morning I disconnected the battery and replaced the plugs.
Couldn't replace the wires because the #1 & #2 replacement wires were too
short! I reinstalled the old wires, reconnected the battery, returned the
autozone wires and drove to NAPA.
The check engine light stayed off! Problem fixed. At NAPA, I asked for
their set of wires and found them to be too long!
Later that day I purchased wires from Mazda. They too were a little
longer
than the originals.
These are working fine, the check engine is off. Not sure the wires
really
needed replacing, but @[EMAIL PROTECTED]
65K it's the safe thing to do.
It gives a great comfort that this news group is here!
Again, Thank you all.
- Pat
P.S. Next "Service" I have to concern myself with is the Timing Belt.
I'll let Mazda do it unless someone has a recommendation in the Plano, Tx
area.
"Pat Dreiding" <patdreiding@[EMAIL PROTECTED]
> wrote in message
news:SYMsj.343$Cs.318@[EMAIL PROTECTED]
>I need a few words of wisdom about my '99. It has 65K miles on it.
About
>a week ago I did something that I believe was very stupid. I cleaned my
>engine by hosing it down. The car ran ok for a little while, but then
>stopped. The engine light was on. Yes - you guessed it. Water in the
plug
>wells. Ugh! I spend the time to remove the water and dry the wires &
plug
>wells. The car was running fine for another few days afterwards and then
>the check engine light returned. The autozone tech told me the trouble
>shooting error code is P0420., which is: "Catalyst efficiency low-bank
> - the oxygen sensors monitor the catalytic converters ability to store
>oxygen.
> Possible causes are:
> 1. Catalytic converter defective (Failure possibly due to #2, 3, or 4);
> 2. Engine msfire or running condition;
> 3. Large vacuum leak;
> 4. Engine oil leakage into exhaust-value guide seals, piston rings
>
> Any suggestions on approach to uderstanding and fixing the problem?
>
> I've been considering replacing the plugs & wires. Is this the correct
> first step?
>
> Thanks,
> - Pat


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