Hello All,

On my sister's 99 Elantra the engine has just suddenly started to shake while in drive. It almost seems like 1 piston isn't firing. She has
about 52,000 miles on it. I've replaced the spark plugs about 20,000 miles ago with NGKs. The only thing is that I bought them from the Hyundai dealer
and who know how long they were sitting there. I'm going to replace the spark plugs with Bosch and see if that fixes the problem but if anyone has any
insight on this, I would greatly appreciate it.

Thanks in advance,
Nick

 

Nick, If you haven't allready, replace the plug wires.
My 99 GLS has a little over 60K miles and I had to replace the plug wires twice.
Also don't forget to have the timming belt replaced at 60K.

In article <b3g8rvo7i0ntscke77aopevupdqu70n0er@4ax.com>, Nick
<npolite@NOSPAMMONKEYShotmail.com> wrote:
>Hello All,
>
> On my sister's 99 Elantra the engine has just suddenly started to shake
> while in drive. It almost seems like 1 piston isn't firing. She has
>about 52,000 miles on it. I've replaced the spark plugs about 20,000 miles ago
> with NGKs. The only thing is that I bought them from the Hyundai dealer
>and who know how long they were sitting there. I'm going to replace the spark
> plugs with Bosch and see if that fixes the problem but if anyone has any
>insight on this, I would greatly appreciate it.
>
>Thanks in advance,
>Nick

Have Fun

--
Jim Inacker
jinacker@atcomcast.net redundant at

 

Any CELs? If you were misfiring there would be a CEL.

On Thu, 13 Nov 2003 21:49:20 -0500, Nick
<npolite@NOSPAMMONKEYShotmail.com> wrote:

>Hello All,
>
> On my sister's 99 Elantra the engine has just suddenly started to shake while in drive. It almost seems like 1 piston isn't firing. She has
>about 52,000 miles on it. I've replaced the spark plugs about 20,000 miles ago with NGKs. The only thing is that I bought them from the Hyundai dealer
>and who know how long they were sitting there. I'm going to replace the spark plugs with Bosch and see if that fixes the problem but if anyone has any
>insight on this, I would greatly appreciate it.
>
>Thanks in advance,
>Nick

 

doest matter if the plugs been sitting around for a while, have you replaced
the ignition wires?
Also, I wouldnt recommend using Bosch plugs, stick with ngk's.
"Nick" <npolite@NOSPAMMONKEYShotmail.com> wrote in message
news:b3g8rvo7i0ntscke77aopevupdqu70n0er@4ax.com...
> Hello All,
>
> On my sister's 99 Elantra the engine has just suddenly started to shake
while in drive. It almost seems like 1 piston isn't firing. She has
> about 52,000 miles on it. I've replaced the spark plugs about 20,000 miles
ago with NGKs. The only thing is that I bought them from the Hyundai dealer
> and who know how long they were sitting there. I'm going to replace the
spark plugs with Bosch and see if that fixes the problem but if anyone has
any
> insight on this, I would greatly appreciate it.
>
> Thanks in advance,
> Nick

 

No I have not replaced the wire. Do they typically need replacing at 50,000 miles?

Thanks,
Nick

On Fri, 14 Nov 2003 15:16:56 -0500, "Jody" <locamrcow@yahoo.ca> wrote:

>doest matter if the plugs been sitting around for a while, have you replaced
>the ignition wires?
>Also, I wouldnt recommend using Bosch plugs, stick with ngk's.
>"Nick" <npolite@NOSPAMMONKEYShotmail.com> wrote in message
>news:b3g8rvo7i0ntscke77aopevupdqu70n0er@4ax.com.. .
>> Hello All,
>>
>> On my sister's 99 Elantra the engine has just suddenly started to shake
>while in drive. It almost seems like 1 piston isn't firing. She has
>> about 52,000 miles on it. I've replaced the spark plugs about 20,000 miles
>ago with NGKs. The only thing is that I bought them from the Hyundai dealer
>> and who know how long they were sitting there. I'm going to replace the
>spark plugs with Bosch and see if that fixes the problem but if anyone has
>any
>> insight on this, I would greatly appreciate it.
>>
>> Thanks in advance,
>> Nick
>

 

Thanks all for your help! It turns out that the wires were bad. I ended up getting new ones with lifetime warrenty on them so hopefully they won't go
bad for a long time. I also bought a new set of Bosch platinum plugs for $2, should I leave these in or put the NGK's back in?

Thanks,
Nick




On Thu, 13 Nov 2003 21:49:20 -0500, Nick <npolite@NOSPAMMONKEYShotmail.com> wrote:

>Hello All,
>
> On my sister's 99 Elantra the engine has just suddenly started to shake while in drive. It almost seems like 1 piston isn't firing. She has
>about 52,000 miles on it. I've replaced the spark plugs about 20,000 miles ago with NGKs. The only thing is that I bought them from the Hyundai dealer
>and who know how long they were sitting there. I'm going to replace the spark plugs with Bosch and see if that fixes the problem but if anyone has any
>insight on this, I would greatly appreciate it.
>
>Thanks in advance,
>Nick

 

On Fri, 14 Nov 2003 17:48:37 -0500, Nick
<npolite@NOSPAMMONKEYShotmail.com> wrote:

>Thanks all for your help! It turns out that the wires were bad. I ended up
> getting new ones with lifetime warrenty on them so hopefully they won't
> go bad for a long time. I also bought a new set of Bosch platinum plugs
> for $2, should I leave these in or put the NGK's back in?
>
>Thanks,
>Nick
>
>================

A number of years ago (5?-6?), Consumer Reports tested the
Bosch+4 plugs and found them no different in action, from 'regular'
plugs. You can take CU's info any way you want. =;-)

S25

 

Thanks for the followup.....I just want to make sure that they don't
damage the engine. On the next swap, I'll be putting back the NGKs.

Nick

On Sun, 16 Nov 2003 05:54:29 GMT, seahorse25@no.net wrote:

>On Fri, 14 Nov 2003 17:48:37 -0500, Nick
><npolite@NOSPAMMONKEYShotmail.com> wrote:
>
>>Thanks all for your help! It turns out that the wires were bad. I ended up
>> getting new ones with lifetime warrenty on them so hopefully they won't
>> go bad for a long time. I also bought a new set of Bosch platinum plugs
>> for $2, should I leave these in or put the NGK's back in?
>>
>>Thanks,
>>Nick
>>
>>================
>
> A number of years ago (5?-6?), Consumer Reports tested the
>Bosch+4 plugs and found them no different in action, from 'regular'
>plugs. You can take CU's info any way you want. =;-)
>
> S25


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If I remember correctly, they still had "regular distributors" as opposed to
DIS.... If this is the case, have you checked the cap and rotor? If it dose
have the DIS ignition, try swapping the coil with a new one. That at least
will give you an idea of what it isn't.

--

S.


If it ain't broke, we can fix that.....

"Nick" <npolite@NOSPAMMONKEYShotmail.com> wrote in message
news:b3g8rvo7i0ntscke77aopevupdqu70n0er@4ax.com...
> Hello All,
>
> On my sister's 99 Elantra the engine has just suddenly started to shake
while in drive. It almost seems like 1 piston isn't firing. She has
> about 52,000 miles on it. I've replaced the spark plugs about 20,000 miles
ago with NGKs. The only thing is that I bought them from the Hyundai dealer
> and who know how long they were sitting there. I'm going to replace the
spark plugs with Bosch and see if that fixes the problem but if anyone has
any
> insight on this, I would greatly appreciate it.
>
> Thanks in advance,
> Nick


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Spark plugs dont get "old" on the shelf. they are only damaged by use.

Check the spark plug leads for cracking. These get cooked by the heat, and
then they short out to the head/cover