Hello,

My 2003 A4 Quattro (3.0) is starting to experience odd rough idle periods.
It will pur like a kitten sometimes, then other times appear like it's ready
to stall. Sometimes it won't start without cranking it over several times.
It has NEVER done any of those things before 85,000 miles. At 85k the plugs
were replaced and the mechanic actually broke one of the coils which he then
replaced.

Since the car has 93,000 miles on it today, I suspect one or more of the the
ignition coils mail be going bad.

I'm considering replacing all 6. Does anyone have any
experience/recommendations for me?

Troy

 

What about the fuel filter?

"Shagster" <noway@nohow.com> wrote in message
news:RN6dnYszmsaPBjHVnZ2dnUVZ_h-dnZ2d@ptd.net...
> Hello,
>
> My 2003 A4 Quattro (3.0) is starting to experience odd rough idle periods.
> It will pur like a kitten sometimes, then other times appear like it's
> ready to stall. Sometimes it won't start without cranking it over several
> times. It has NEVER done any of those things before 85,000 miles. At 85k
> the plugs were replaced and the mechanic actually broke one of the coils
> which he then replaced.
>
> Since the car has 93,000 miles on it today, I suspect one or more of the
> the ignition coils mail be going bad.
>
> I'm considering replacing all 6. Does anyone have any
> experience/recommendations for me?
>
> Troy
>
>

 

that was replaced within 15k miles.


"Bill" <bargerw@bellsouth.net> wrote in message
news:992rk.13128$rD2.3311@bignews4.bellsouth.net.. .
> What about the fuel filter?
>
> "Shagster" <noway@nohow.com> wrote in message
> news:RN6dnYszmsaPBjHVnZ2dnUVZ_h-dnZ2d@ptd.net...
>> Hello,
>>
>> My 2003 A4 Quattro (3.0) is starting to experience odd rough idle
>> periods. It will pur like a kitten sometimes, then other times appear
>> like it's ready to stall. Sometimes it won't start without cranking it
>> over several times. It has NEVER done any of those things before 85,000
>> miles. At 85k the plugs were replaced and the mechanic actually broke
>> one of the coils which he then replaced.
>>
>> Since the car has 93,000 miles on it today, I suspect one or more of the
>> the ignition coils mail be going bad.
>>
>> I'm considering replacing all 6. Does anyone have any
>> experience/recommendations for me?
>>
>> Troy
>>
>>
>
>

 

and no engine check light or diagnostic trouble codes stored?

What brand and part number spark plugs? exactly what came out?
Maybe bad gas?

I vote Coolant Temperature Sensor for the fuel injection. That can go bad
and not set off the check light!
--
later,
(One out of many daves)
1997 Red A4 1.8tq auto

"Shagster" <noway@nohow.com> wrote in message
news:NZOdnYNw6tCPJTHVnZ2dnUVZ_tTinZ2d@ptd.net...
> that was replaced within 15k miles.
>
>
> "Bill" <bargerw@bellsouth.net> wrote in message
> news:992rk.13128$rD2.3311@bignews4.bellsouth.net.. .
>> What about the fuel filter?
>>
>> "Shagster" <noway@nohow.com> wrote in message
>> news:RN6dnYszmsaPBjHVnZ2dnUVZ_h-dnZ2d@ptd.net...
>>> Hello,
>>>
>>> My 2003 A4 Quattro (3.0) is starting to experience odd rough idle
>>> periods. It will pur like a kitten sometimes, then other times appear
>>> like it's ready to stall. Sometimes it won't start without cranking it
>>> over several times. It has NEVER done any of those things before 85,000
>>> miles. At 85k the plugs were replaced and the mechanic actually broke
>>> one of the coils which he then replaced.
>>>
>>> Since the car has 93,000 miles on it today, I suspect one or more of the
>>> the ignition coils mail be going bad.
>>>
>>> I'm considering replacing all 6. Does anyone have any
>>> experience/recommendations for me?
>>>
>>> Troy
>>>
>>>
>>
>>
>
>

 

OK... my plugs were replaced at 85k by the DEALER so I'll assume Audi OEM
plugs.

Been running Sunco Ultra 93-94 since I bought the car religously.

NO check-engine lights.

Coolant temp sensor??? REALLY???

troy


"dave AKA vwdoc1" <vwdoc1nospam@pleasehotmail.com> wrote in message
news:bY2rk.37230$ZE5.26630@nlpi061.nbdc.sbc.com...
> and no engine check light or diagnostic trouble codes stored?
>
> What brand and part number spark plugs? exactly what came out?
> Maybe bad gas?
>
> I vote Coolant Temperature Sensor for the fuel injection. That can go bad
> and not set off the check light!
> --
> later,
> (One out of many daves)
> 1997 Red A4 1.8tq auto
>
> "Shagster" <noway@nohow.com> wrote in message
> news:NZOdnYNw6tCPJTHVnZ2dnUVZ_tTinZ2d@ptd.net...
>> that was replaced within 15k miles.
>>
>>
>> "Bill" <bargerw@bellsouth.net> wrote in message
>> news:992rk.13128$rD2.3311@bignews4.bellsouth.net.. .
>>> What about the fuel filter?
>>>
>>> "Shagster" <noway@nohow.com> wrote in message
>>> news:RN6dnYszmsaPBjHVnZ2dnUVZ_h-dnZ2d@ptd.net...
>>>> Hello,
>>>>
>>>> My 2003 A4 Quattro (3.0) is starting to experience odd rough idle
>>>> periods. It will pur like a kitten sometimes, then other times appear
>>>> like it's ready to stall. Sometimes it won't start without cranking it
>>>> over several times. It has NEVER done any of those things before 85,000
>>>> miles. At 85k the plugs were replaced and the mechanic actually broke
>>>> one of the coils which he then replaced.
>>>>
>>>> Since the car has 93,000 miles on it today, I suspect one or more of
>>>> the the ignition coils mail be going bad.
>>>>
>>>> I'm considering replacing all 6. Does anyone have any
>>>> experience/recommendations for me?
>>>>
>>>> Troy
>>>>
>>>>
>>>
>>>
>>
>>
>
>

 

Yep that pesky little sensor could throw incorrect information to the ECM
and allow the engine to run either too lean or too rich. It is not
expensive AFAIK


"Shagster" <noway@nohow.com> wrote in message
news:-fOdnV2VWrGJXzHVnZ2dnUVZ_vWdnZ2d@ptd.net...
> OK... my plugs were replaced at 85k by the DEALER so I'll assume Audi OEM
> plugs.
>
> Been running Sunco Ultra 93-94 since I bought the car religously.
>
> NO check-engine lights.
>
> Coolant temp sensor??? REALLY???
>
> troy

 

hi Dave - that sounds like a great place to start. Do you have any
product/part number or anything I can search the web for?

thanks again for the tip!

troy


"dave AKA vwdoc1" <vwdoc1nospam@pleasehotmail.com> wrote in message
news:c15rk.17336$LG4.11108@nlpi065.nbdc.sbc.com...
> Yep that pesky little sensor could throw incorrect information to the ECM
> and allow the engine to run either too lean or too rich. It is not
> expensive AFAIK
>
>
> "Shagster" <noway@nohow.com> wrote in message
> news:-fOdnV2VWrGJXzHVnZ2dnUVZ_vWdnZ2d@ptd.net...
>> OK... my plugs were replaced at 85k by the DEALER so I'll assume Audi OEM
>> plugs.
>>
>> Been running Sunco Ultra 93-94 since I bought the car religously.
>>
>> NO check-engine lights.
>>
>> Coolant temp sensor??? REALLY???
>>
>> troy
>
>

 

I like to use my vag-com tool to see if anything is wrong rather than
throwing parts into vehicles. The Coolant Temperature Sensor is not
expensive, but your 2003 is supposed to have the good one unlike my 1997.


Read and save this information.
http://www.elitedubs.com/index.php?topic=988

Location and picture and how to replace along with part numbers
http://forums.audiworld.com/a4/msgs/2299786.phtml

--
later,
(One out of many daves)
1997 Red A4 1.8tq auto

"Shagster" <noway@nohow.com> wrote in message
news:L_2dnTiwx7-i0DDVnZ2dnUVZ_qzinZ2d@ptd.net...
> hi Dave - that sounds like a great place to start. Do you have any
> product/part number or anything I can search the web for?
>
> thanks again for the tip!
>
> troy
>
>
> "dave AKA vwdoc1" <vwdoc1nospam@pleasehotmail.com> wrote in message
> news:c15rk.17336$LG4.11108@nlpi065.nbdc.sbc.com...
>> Yep that pesky little sensor could throw incorrect information to the ECM
>> and allow the engine to run either too lean or too rich. It is not
>> expensive AFAIK
>>
>>
>> "Shagster" <noway@nohow.com> wrote in message
>> news:-fOdnV2VWrGJXzHVnZ2dnUVZ_vWdnZ2d@ptd.net...
>>> OK... my plugs were replaced at 85k by the DEALER so I'll assume Audi
>>> OEM plugs.
>>>
>>> Been running Sunco Ultra 93-94 since I bought the car religously.
>>>
>>> NO check-engine lights.
>>>
>>> Coolant temp sensor??? REALLY???
>>>
>>> troy
>>
>>
>
>

 

On Aug 20, 6:30 pm, "Shagster" <no...@nohow.com> wrote:
> Hello,
>
> My 2003 A4 Quattro (3.0) is starting to experience odd rough idle periods..
> It will pur like a kitten sometimes, then other times appear like it's ready
> to stall. Sometimes it won't start without cranking it over several times.
> It has NEVER done any of those things before 85,000 miles. At 85k the plugs
> were replaced and the mechanic actually broke one of the coils which he then
> replaced.
>
> Since the car has 93,000 miles on it today, I suspect one or more of the the
> ignition coils mail be going bad.
>
> I'm considering replacing all 6. Does anyone have any
> experience/recommendations for me?

Troy, sounds like you already have a place to start - but just FYI,
the symptoms you describe were NOT what I had when 1 of my coil packs
went bad about 2 months ago. The car would start fine, and idled fine,
but would stutter badly when I put any load on the engine - it was
only running on 3 cylinders, basically. That type of failure would
throw a code, causing the CEL to light up.

Cost to replace one was $300-plus, so I did NOT consider just
replacing the other 3 at the same time!

Dan D
'04 A4 1.8Tq MT-6
Central NJ USA

 

Dano58 wrote:
> On Aug 20, 6:30 pm, "Shagster" <no...@nohow.com> wrote:
>
>> Hello,
>>
>> My 2003 A4 Quattro (3.0) is starting to experience odd rough idle periods.
>> It will pur like a kitten sometimes, then other times appear like it's ready
>> to stall. Sometimes it won't start without cranking it over several times.
>> It has NEVER done any of those things before 85,000 miles. At 85k the plugs
>> were replaced and the mechanic actually broke one of the coils which he then
>> replaced.
>>
>> Since the car has 93,000 miles on it today, I suspect one or more of the the
>> ignition coils mail be going bad.
>>
>> I'm considering replacing all 6. Does anyone have any
>> experience/recommendations for me?
>>
>
> Troy, sounds like you already have a place to start - but just FYI,
> the symptoms you describe were NOT what I had when 1 of my coil packs
> went bad about 2 months ago. The car would start fine, and idled fine,
> but would stutter badly when I put any load on the engine - it was
> only running on 3 cylinders, basically. That type of failure would
> throw a code, causing the CEL to light up.
>
> Cost to replace one was $300-plus, so I did NOT consider just
> replacing the other 3 at the same time!
>
> Dan D
> '04 A4 1.8Tq MT-6
> Central NJ USA
>
>
I agree that it doesn't sound like a coil pack. More like a vacuum leak,
failed MAF or coolant sensor.

Those dealers sure can get greedy.

Most on-line sources charge around $30 for an R series coil pack and
changing them takes only a minute. I have seen them for as low as $23.

https://www.autohausaz.com/search/pr...gnition%20Coil