Hard to start A4 with motor warm
 

Hi again,

As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
8D - same as B5 saloon, motor variant AJL) requires the starter motor to
turn over for ca 15 seconds before I get ignition. This is the case if
the motor is hot or warm.

Car starts immediately on cold engine. Plugs are clean and gapped to
spec (0,8 mm).

Where do I start?

/Robert, in Sweden where we finally got a little snow this morning.

Re: Hard to start A4 with motor warm
 

On Sat, 20 Jan 2007 16:15:56 GMT, Robert <rxobert.bxrown@txripnet.se> wrote:

>Hi again,
>
>As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
>8D - same as B5 saloon, motor variant AJL) requires the starter motor to
>turn over for ca 15 seconds before I get ignition. This is the case if
>the motor is hot or warm.
>
>Car starts immediately on cold engine. Plugs are clean and gapped to
>spec (0,8 mm).
>
>Where do I start?
>
>/Robert, in Sweden where we finally got a little snow this morning.

Dump ECU error codes and see if there's anything that jumps out, particularly
fuel mix errors.

There may be a temp sensor at the root cause of the problem; someone good with
a code reader may be able to see if a sensor component has aged beyond its
useful life (looking for out of range adaptation values, for instance).

Either way, the best way to attack this kind of problem is through the OBD
port...

/daytripper
'00 s4 6spd

Re: Hard to start A4 with motor warm
 

On Sat, 20 Jan 2007 16:15:56 GMT, Robert <rxobert.bxrown@txripnet.se> wrote:

>Hi again,
>
>As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
>8D - same as B5 saloon, motor variant AJL) requires the starter motor to
>turn over for ca 15 seconds before I get ignition. This is the case if
>the motor is hot or warm.
>
>Car starts immediately on cold engine. Plugs are clean and gapped to
>spec (0,8 mm).
>
>Where do I start?
>
>/Robert, in Sweden where we finally got a little snow this morning.

Dump ECU error codes and see if there's anything that jumps out, particularly
fuel mix errors.

There may be a temp sensor at the root cause of the problem; someone good with
a code reader may be able to see if a sensor component has aged beyond its
useful life (looking for out of range adaptation values, for instance).

Either way, the best way to attack this kind of problem is through the OBD
port...

/daytripper
'00 s4 6spd

Re: Hard to start A4 with motor warm
 

On Sat, 20 Jan 2007 16:15:56 GMT, Robert <rxobert.bxrown@txripnet.se> wrote:

>Hi again,
>
>As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
>8D - same as B5 saloon, motor variant AJL) requires the starter motor to
>turn over for ca 15 seconds before I get ignition. This is the case if
>the motor is hot or warm.
>
>Car starts immediately on cold engine. Plugs are clean and gapped to
>spec (0,8 mm).
>
>Where do I start?
>
>/Robert, in Sweden where we finally got a little snow this morning.

Dump ECU error codes and see if there's anything that jumps out, particularly
fuel mix errors.

There may be a temp sensor at the root cause of the problem; someone good with
a code reader may be able to see if a sensor component has aged beyond its
useful life (looking for out of range adaptation values, for instance).

Either way, the best way to attack this kind of problem is through the OBD
port...

/daytripper
'00 s4 6spd

Re: Hard to start A4 with motor warm
 

On Sat, 20 Jan 2007 16:15:56 GMT, Robert <rxobert.bxrown@txripnet.se> wrote:

>Hi again,
>
>As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
>8D - same as B5 saloon, motor variant AJL) requires the starter motor to
>turn over for ca 15 seconds before I get ignition. This is the case if
>the motor is hot or warm.
>
>Car starts immediately on cold engine. Plugs are clean and gapped to
>spec (0,8 mm).
>
>Where do I start?
>
>/Robert, in Sweden where we finally got a little snow this morning.

Dump ECU error codes and see if there's anything that jumps out, particularly
fuel mix errors.

There may be a temp sensor at the root cause of the problem; someone good with
a code reader may be able to see if a sensor component has aged beyond its
useful life (looking for out of range adaptation values, for instance).

Either way, the best way to attack this kind of problem is through the OBD
port...

/daytripper
'00 s4 6spd

Re: Hard to start A4 with motor warm
 

Robert wrote:
> Hi again,
>
> As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
> 8D - same as B5 saloon, motor variant AJL) requires the starter motor to
> turn over for ca 15 seconds before I get ignition. This is the case if
> the motor is hot or warm.
>
> Car starts immediately on cold engine. Plugs are clean and gapped to
> spec (0,8 mm).
>
> Where do I start?
>
> /Robert, in Sweden where we finally got a little snow this morning.
>
I would start with the temperature sensor.

Re: Hard to start A4 with motor warm
 

Robert wrote:
> Hi again,
>
> As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
> 8D - same as B5 saloon, motor variant AJL) requires the starter motor to
> turn over for ca 15 seconds before I get ignition. This is the case if
> the motor is hot or warm.
>
> Car starts immediately on cold engine. Plugs are clean and gapped to
> spec (0,8 mm).
>
> Where do I start?
>
> /Robert, in Sweden where we finally got a little snow this morning.
>
I would start with the temperature sensor.

Re: Hard to start A4 with motor warm
 

Robert wrote:
> Hi again,
>
> As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
> 8D - same as B5 saloon, motor variant AJL) requires the starter motor to
> turn over for ca 15 seconds before I get ignition. This is the case if
> the motor is hot or warm.
>
> Car starts immediately on cold engine. Plugs are clean and gapped to
> spec (0,8 mm).
>
> Where do I start?
>
> /Robert, in Sweden where we finally got a little snow this morning.
>
I would start with the temperature sensor.

Re: Hard to start A4 with motor warm
 

Robert wrote:
> Hi again,
>
> As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
> 8D - same as B5 saloon, motor variant AJL) requires the starter motor to
> turn over for ca 15 seconds before I get ignition. This is the case if
> the motor is hot or warm.
>
> Car starts immediately on cold engine. Plugs are clean and gapped to
> spec (0,8 mm).
>
> Where do I start?
>
> /Robert, in Sweden where we finally got a little snow this morning.
>
I would start with the temperature sensor.

Re: Hard to start A4 with motor warm
 

TonyJ wrote:
>
>
> Robert wrote:
>
>> Hi again,
>>
>> As indicated in subj line, my A4 (Avant 1,8 TS, MY2001, though chassis
>> 8D - same as B5 saloon, motor variant AJL) requires the starter motor
>> to turn over for ca 15 seconds before I get ignition. This is the case
>> if the motor is hot or warm.
>>
>> Car starts immediately on cold engine. Plugs are clean and gapped to
>> spec (0,8 mm).
>>
>> Where do I start?
>>
>> /Robert, in Sweden where we finally got a little snow this morning.
>>
> I would start with the temperature sensor.

Thanks Tony and Daytripper for your ideas.

Tomorrow I will buy the new temp sensor and see if it gives different
readings that might stop the warm start problem.

Going from the practical to the theoretical - assuming that my
temperature sensor is indeed faulty, how would a new one, reading ca. 5C
higher, solve my starting problem?

Thanks, Robert