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98 Grand Marquis Mis Firing

 
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mstrspy

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Since: Oct 23, 2005
Posts: 53



(Msg. 1) Posted: Wed Mar 01, 2006 11:55 pm
Post subject: 98 Grand Marquis Mis Firing
Archived from groups: alt>autos>ford (more info?)

My 98 Grand Marquis is miss- firing. I got a check engine light. I
will bring the car in for service tommorow, but I am told that this is
an expensive ordeal The spark plug colis fail and they are $60/each
The spark plugs have alreay been replaced.
nyone else have a similar probelm? The car has 125,000 miles on it
M

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chuckster

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Since: Jul 11, 2005
Posts: 11



(Msg. 2) Posted: Wed Mar 01, 2006 11:55 pm
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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REPLACE THEM ALL!!! I did mine and it was the best thing I did to the
car, it now runs like new. You can try replacing the boots only along
with the plugs and see if it helps. (don't forget the lube)

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mstrspy

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Since: Oct 23, 2005
Posts: 53



(Msg. 3) Posted: Thu Mar 02, 2006 3:55 am
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Replacing them all sounds like the right idea. I don't want to keep
taking time off from work and going to my mechanic to replace these
things one at a time. Anyway, may I ask roughly what the replacement
cost off 8 coils was for you? I'm guessing it is about $400.00 for
parts for all 8 coils




On 1 Mar 2006 16:54:27 -0800, "chuckster" wrote:

>REPLACE THEM ALL!!! I did mine and it was the best thing I did to the
>car, it now runs like new. You can try replacing the boots only along
>with the plugs and see if it helps. (don't forget the lube)
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tom

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Since: Feb 02, 2005
Posts: 54



(Msg. 4) Posted: Thu Mar 02, 2006 8:14 am
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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coils can be bought aftermarket for$35.
on a side note, if someone put oil in the motor and missed the hole in the
valve cover, the oil will fill up the spark plug holes in the head, causing
the coils to short out, giving you a misfire condition, but it will not give
you a trouble code. very hard to diagnose.
"mstrspy" wrote in message

> Replacing them all sounds like the right idea. I don't want to keep
> taking time off from work and going to my mechanic to replace these
> things one at a time. Anyway, may I ask roughly what the replacement
> cost off 8 coils was for you? I'm guessing it is about $400.00 for
> parts for all 8 coils
>
>
>
>
> On 1 Mar 2006 16:54:27 -0800, "chuckster" wrote:
>
> >REPLACE THEM ALL!!! I did mine and it was the best thing I did to the
> >car, it now runs like new. You can try replacing the boots only along
> >with the plugs and see if it helps. (don't forget the lube)
>
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chuckster

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Since: Jul 11, 2005
Posts: 11



(Msg. 5) Posted: Thu Mar 02, 2006 6:37 pm
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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I purchased all 8 coil packs from Auto Zone for about $65.00 each, I
guess I got ripped off as Toms post said they go for $35 aftermarket.
(give up your supplier Tom!) I am happy and everything works well after
35 K miles. A small investment for a pain in the ass problem, I say go
for it along with a set of quailty plugs. Job takes less than 60
minutes and that way you will know what you have when you are done.
(don't forget the lube!)
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Puddin' Man

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Since: Jan 05, 2006
Posts: 23



(Msg. 6) Posted: Thu Mar 02, 2006 7:55 pm
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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On Wed, 01 Mar 2006 23:22:03 GMT, mstrspy wrote:

>My 98 Grand Marquis is miss- firing. I got a check engine light. I
>will bring the car in for service tommorow, but I am told that this is
>an expensive ordeal The spark plug colis fail and they are $60/each
>The spark plugs have alreay been replaced.

Did they replace the plug wires? Wires can be a major cause
of mis-fire on 4.6's from the 90's.

I got about 6 yrs/40k mi. on my 4.6 before I had to
replace the wires.

Cheers,
Puddin'
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chuckster

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Since: Jul 11, 2005
Posts: 11



(Msg. 7) Posted: Thu Mar 02, 2006 9:25 pm
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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I just checked out my super secret parts supplier and found out they
are $50 each. Here is the source: www.rockauto.com I went to Auto
Zone because they had them in stock and a young girl with big hooters
waited on me and I lost all financial control and could not help myself
from over paying, Hell, I used to stop in just in to buy one quart of
motor oil at a time instead of 5 quarts at one time, just to look at
her. She has since left my local Auto Zone, so I just go for the best
price online for parts and buy my oil at Wal Mart, and save big. (don't
forget the lube!)
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tom

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Since: Feb 02, 2005
Posts: 54



(Msg. 8) Posted: Thu Mar 02, 2006 11:14 pm
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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well, if you insist. Wink

Napa online. that was about 18 months ago. I can't see them going up that
mush though.


"chuckster" wrote in message

> I purchased all 8 coil packs from Auto Zone for about $65.00 each, I
> guess I got ripped off as Toms post said they go for $35 aftermarket.
> (give up your supplier Tom!) I am happy and everything works well after
> 35 K miles. A small investment for a pain in the ass problem, I say go
> for it along with a set of quailty plugs. Job takes less than 60
> minutes and that way you will know what you have when you are done.
> (don't forget the lube!)
>
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Happy Traveler1

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Since: Aug 21, 2004
Posts: 143



(Msg. 9) Posted: Fri Mar 03, 2006 7:32 am
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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My newest vehicle is a 98 Explorer - still the older 'distributorless'
ignition system. When the ignition wires failed for the second time, I
thought that COPs were the ultimate solution to this problem. What's better
than making the high voltage right on the plug? No long path with twists and
turns, no insulation to dry out, no cross-firing between cylinders when you
don't dress those wires properly, even less opportunity for radio frequency
interference... But from reading the adventures of those who actually own
those things, I understand that instead of replacing a set of wires every
couple years for $100, now it's a set of COPs for $500 (dealer's prices).
Assuming that you even know how to diagnose those things -- is there a spot
to stick a scope probe in there at all? Does this 'improvement' make any
sense?
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Neil Nelson

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Since: Jul 08, 2003
Posts: 41



(Msg. 10) Posted: Fri Mar 03, 2006 3:55 pm
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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In article ,
"Happy Traveler" wrote:

> My newest vehicle is a 98 Explorer - still the older 'distributorless'
> ignition system. When the ignition wires failed for the second time, I
> thought that COPs were the ultimate solution to this problem. What's better
> than making the high voltage right on the plug? No long path with twists and
> turns, no insulation to dry out, no cross-firing between cylinders when you
> don't dress those wires properly, even less opportunity for radio frequency
> interference... But from reading the adventures of those who actually own
> those things, I understand that instead of replacing a set of wires every
> couple years for $100, now it's a set of COPs for $500 (dealer's prices).

Better the reason to not ignore maintenance on the ignition
system.

> Assuming that you even know how to diagnose those things -- is there a spot
> to stick a scope probe in there at all?

Not "in" there. -On there.- COP secondary scope pick up is
placed on the coil, much the same as was done for the old GM,
Honda, Toyota coil in cap designs. Primary is accessed the same
as always unless the coil driver is integral to the coil, primary
'mirrors' secondary so useful except for absolute exact KV
values. Primary current waveform is also available off of the
primary lead.

> Does this 'improvement' make any
> sense?

From a service standpoint, probably not.
From an emissions and driveability standpoint, probably yes.

Ford claims that a very high percentage of COP coils replaced
under warranty are not defective...

My experience has been that there are more problems with carbon
tracked secondary boots and more problems with the terminals that
connect the primary.
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mstrspy

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Since: Oct 23, 2005
Posts: 53



(Msg. 11) Posted: Sat Mar 04, 2006 2:55 am
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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Paid $90.00 installed for one coil. I got the part at cost for $70 and
paid my brother $20.00 for installation. What a huge rippoff these
parts are. Someone mentioned they got theirs for $35? Where? My
brother owns his own garage and I saw what his exact cost was.


On Fri, 03 Mar 2006 14:29:43 GMT, Neil Nelson
wrote:

>In article ,
> "Happy Traveler" wrote:
>
>> My newest vehicle is a 98 Explorer - still the older 'distributorless'
>> ignition system. When the ignition wires failed for the second time, I
>> thought that COPs were the ultimate solution to this problem. What's better
>> than making the high voltage right on the plug? No long path with twists and
>> turns, no insulation to dry out, no cross-firing between cylinders when you
>> don't dress those wires properly, even less opportunity for radio frequency
>> interference... But from reading the adventures of those who actually own
>> those things, I understand that instead of replacing a set of wires every
>> couple years for $100, now it's a set of COPs for $500 (dealer's prices).
>
>Better the reason to not ignore maintenance on the ignition
>system.
>
>> Assuming that you even know how to diagnose those things -- is there a spot
>> to stick a scope probe in there at all?
>
>Not "in" there. -On there.- COP secondary scope pick up is
>placed on the coil, much the same as was done for the old GM,
>Honda, Toyota coil in cap designs. Primary is accessed the same
>as always unless the coil driver is integral to the coil, primary
>'mirrors' secondary so useful except for absolute exact KV
>values. Primary current waveform is also available off of the
>primary lead.
>
>> Does this 'improvement' make any
>> sense?
>
>From a service standpoint, probably not.
>From an emissions and driveability standpoint, probably yes.
>
>Ford claims that a very high percentage of COP coils replaced
>under warranty are not defective...
>
>My experience has been that there are more problems with carbon
>tracked secondary boots and more problems with the terminals that
>connect the primary.
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Neil Nelson

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Since: Jul 08, 2003
Posts: 41



(Msg. 12) Posted: Sat Mar 04, 2006 3:55 am
Post subject: Re: 98 Grand Marquis Mis Firing [Login to view extended thread Info.]
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In article ,
mstrspy wrote:

> Paid $90.00 installed for one coil. I got the part at cost for $70 and
> paid my brother $20.00 for installation. What a huge rippoff these
> parts are. Someone mentioned they got theirs for $35? Where? My
> brother owns his own garage and I saw what his exact cost was.

You have the benefit of your brothers knowledge that there are
superior and inferior parts being marketed.
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mstrspy

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Since: Oct 23, 2005
Posts: 53



(Msg. 13) Posted: Sat Mar 04, 2006 4:55 am
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That is true; he doesn't buy cheap parts. He also has the right
equipment to diagnose which cylinder was bad. He as some sort of
computer hookup that tells him everything that is going on. Really
expensive equipmnet but it allows him to diagnose problems quick.
M

On Sat, 04 Mar 2006 03:13:42 GMT, Neil Nelson
wrote:

>In article ,
> mstrspy wrote:
>
>> Paid $90.00 installed for one coil. I got the part at cost for $70 and
>> paid my brother $20.00 for installation. What a huge rippoff these
>> parts are. Someone mentioned they got theirs for $35? Where? My
>> brother owns his own garage and I saw what his exact cost was.
>
>You have the benefit of your brothers knowledge that there are
>superior and inferior parts being marketed.
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chuckster

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Since: Jul 11, 2005
Posts: 11



(Msg. 14) Posted: Sat Mar 04, 2006 12:06 pm
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Well, How does it run after the coil replacement?? Problem solved?? So
I guess I didn't get ripped off at $65 per coil. I am happy today. Life
is good.
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mstrspy

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Since: Oct 23, 2005
Posts: 53



(Msg. 15) Posted: Sun Mar 05, 2006 2:55 am
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The car runs good now. No more skipping. I did take the old part with
me because I wanted to test it to see why it failed.

This coil assembly consists of a coil + a spring and a short
wire-like piece that fits in the spring. Sorry I can't draw a clearer
picture, but I checked this coil out and found that the coil itself
had the proper resistance, but the wire part was open. Is is possible
to replace only the wire? My brother usualy changes the whole thing,
but I'm wondering if you can get the wire as a seperate part.

On 4 Mar 2006 07:06:30 -0800, "chuckster" wrote:

>Well, How does it run after the coil replacement?? Problem solved?? So
>I guess I didn't get ripped off at $65 per coil. I am happy today. Life
>is good.
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