Agreed. Any sort of miss or stumble and the coil gets replaced because it's an
easy job and people don't want--or don't
know how--to diagnose ignition problems. Also, fancy 'sports coils' get
installed with little or no improvement to the
engine's performance (and maybe worse performance if the rest of the system
isn't upgraded).
But, COPs are definitely causing problems in a lot of cars. 'P303',' I
believe, is a miss in #3 cylinder. I'd replace
that one and if the problem goes away I'd replace the other coils. I found a
website where a pro mechanic had a similar
problem to my dad's and did a very thorough diagnostic with modern computerized
equipment. He found a bad coil would
cause a voltage spike on the primary ignition wiring which caused the ECM to
shut down.
Bob
On 9/16/2011 5:08 PM, Douglas Braun wrote:
> I bet that over the decades, at least 50% of all coil replacements actually
> replaced a perfectly good coil, with no effect on the car's operation.
>
> Doug
>
> On Fri, Sep 16, 2011 at 5:25 PM, Randall<tr3driver at ca.rr.com> wrote:
>
>>> The original coil on my 1967 Austin-Healey, OTOH, has been going strong
>>> for 45 years and 170K+ miles.
>> The original coil on my 56 Triumph did about as well; but the "Lucas"
>> replacement only lasted 2 years.
>>
>> Too many components bought from the lowest bidder, I'd guess. The ignition
>> coil on my 95 Buick (which may have been one of the last American cars to
>> actually have a single coil& distributor) has already been replaced twice.
>>
>> --
>
>
--
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Bob Spidell San Jose, CA bspidell at comcast.net
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