This engine was running flawlessly. On a fairly long
highway trip, it started to misfire. By the end of the
trip I am pretty sure that there were two or more
cylinders misfiring. Please note that I had never
experienced *any* misfires before this event. I
want to make this clear because I think this
diminishes the likelihood that plugs are involved,
although the plugs have not been changed in
some time.
Plugs are very expensive to change in this
car and only the dealer will change them. As
the car has 150K miles on it and has other
non-engine problems, I am trying to avoid
spending money needlessly. If possible, I
would like to examine all the less expensive
possibilities first, ruling out everything but the
plugs before I "bite the bullet." (Around $400.)
Could someone list all the other possibilities
that might be making this engine misfire on
multiple cylinders, and that could cause this
to occur suddenly?
Many thanks for your help!
Frank
27
Jan
2001 Cadillac DeVille with Multiple Misfires
On Jan 29, 9:53 am, frank1492 <frank1…@verizon.net> wrote:
> This engine was running flawlessly. On a fairly long
> highway trip, it started to misfire. By the end of the
> trip I am pretty sure that there were two or more
> cylinders misfiring. Please note that I had never
> experienced *any* misfires before this event. I
> want to make this clear because I think this
> diminishes the likelihood that plugs are involved,
> although the plugs have not been changed in
> some time.
Sounds like moisture in the gas to me. Get some heat or similar
product.
- Hide quoted text — Show quoted text -
> Plugs are very expensive to change in this
> car and only the dealer will change them. As
> the car has 150K miles on it and has other
> non-engine problems, I am trying to avoid
> spending money needlessly. If possible, I
> would like to examine all the less expensive
> possibilities first, ruling out everything but the
> plugs before I "bite the bullet." (Around $400.)
> Could someone list all the other possibilities
> that might be making this engine misfire on
> multiple cylinders, and that could cause this
> to occur suddenly?
> Many thanks for your help!
> Frank
RamrodSteel <timxtr…@gmail.com> wrote:
R> On Jan 29, 9:53 am, frank1492 <frank1…@verizon.net> wrote:
>> This engine was running flawlessly. On a fairly long
>> highway trip, it started to misfire. By the end of the
>> trip I am pretty sure that there were two or more
>> cylinders misfiring. Please note that I had never
>> experienced *any* misfires before this event. I
>> want to make this clear because I think this
>> diminishes the likelihood that plugs are involved,
>> although the plugs have not been changed in
>> some time.
R> Sounds like moisture in the gas to me. Get some heat or similar
R> product.
R>
>> Plugs are very expensive to change in this
>> car and only the dealer will change them. As
>> the car has 150K miles on it and has other
>> non-engine problems, I am trying to avoid
>> spending money needlessly. If possible, I
>> would like to examine all the less expensive
>> possibilities first, ruling out everything but the
>> plugs before I "bite the bullet." (Around $400.)
>> Could someone list all the other possibilities
>> that might be making this engine misfire on
>> multiple cylinders, and that could cause this
>> to occur suddenly?
>> Many thanks for your help!
>> Frank
Plugs,… or plug wires.
When dark, and "injun" fully warmed up and running, spray some water mist
over the plug wires. If you see "lightning" under the hood, you have bad
plug wires.
If plugs and/or wires have never been replaced, @ 150Kmi, I’d seriously
consider doing it. Nowadays these last a long time but not forever. The
plugs (or at least one or two) can be difficult to replace but every
semi-reputable mechanic can easily do it, and for a lot less than the
dealer.
By the way, if it really was a misfire that should’ve set a code, which
can prolly be pulled using the HVAC cluster. I know how to do it for my
’97 STS, but this might not be the same for your 2001. Google for it.
–
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/\ www.asciiribbon.org – against proprietary attachments
The code was 300- multiple random misfires.
The dealer diagnosed the problem today-
it was the coil. $465 + $100 diagnostic.
Thanks to all for your help!
Frank
On Wed, 31 Jan 2007 12:08:26 +0000 (UTC), BG
- Hide quoted text — Show quoted text -
<b…@bluedog.cc.emory.edu> wrote:
>RamrodSteel <timxtr…@gmail.com> wrote:
>R> On Jan 29, 9:53 am, frank1492 <frank1…@verizon.net> wrote:
>>> This engine was running flawlessly. On a fairly long
>>> highway trip, it started to misfire. By the end of the
>>> trip I am pretty sure that there were two or more
>>> cylinders misfiring. Please note that I had never
>>> experienced *any* misfires before this event. I
>>> want to make this clear because I think this
>>> diminishes the likelihood that plugs are involved,
>>> although the plugs have not been changed in
>>> some time.
>R> Sounds like moisture in the gas to me. Get some heat or similar
>R> product.
>R>
>>> Plugs are very expensive to change in this
>>> car and only the dealer will change them. As
>>> the car has 150K miles on it and has other
>>> non-engine problems, I am trying to avoid
>>> spending money needlessly. If possible, I
>>> would like to examine all the less expensive
>>> possibilities first, ruling out everything but the
>>> plugs before I "bite the bullet." (Around $400.)
>>> Could someone list all the other possibilities
>>> that might be making this engine misfire on
>>> multiple cylinders, and that could cause this
>>> to occur suddenly?
>>> Many thanks for your help!
>>> Frank
>Plugs,… or plug wires.
>When dark, and "injun" fully warmed up and running, spray some water mist
>over the plug wires. If you see "lightning" under the hood, you have bad
>plug wires.
>If plugs and/or wires have never been replaced, @ 150Kmi, I’d seriously
>consider doing it. Nowadays these last a long time but not forever. The
>plugs (or at least one or two) can be difficult to replace but every
>semi-reputable mechanic can easily do it, and for a lot less than the
>dealer.
>By the way, if it really was a misfire that should’ve set a code, which
>can prolly be pulled using the HVAC cluster. I know how to do it for my
>’97 STS, but this might not be the same for your 2001. Google for it.