Audi 80 splutters after cold start?
#31
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
"Redwood" <not@home.net> wrote in message
news:5iaq4kF3oenuvU1@mid.individual.net...
> "Tim.." <the.farm.no@spam.btinternet.com> wrote in message
> news:ZsydnaHOq61Ft13bRVnygAA@bt.com...
>>
>> "Redwood" <not@home.net> wrote in message
>> news:5ianguF3omc0kU1@mid.individual.net...
>>> "dave AKA vwdoc1" <vwdoc1@hotmail.com> wrote in message
>>> news:ghGvi.309$%Y7.74@nlpi069.nbdc.sbc.com...
>>>> Coolant Temperature Sensor for the Fuel Injection
>>>> Loose clamps on the Intake Manifold Boot.
>>>> Bad Fuel Injector Seals allowing air by them until they warm up and
>>>> expand.
>>>> Possibly a fuel pressure problem.
>>>> To name a few possibilities.
>>>>
>>>> Did it have this problem BEFORE the full service?
>>>
>>> Thanks Dave, yes according to the owner it has been a bit stuttery on
>>> initial start off for some time. I checked the ecu temp sensor which is
>>> giving normal readings (300ohm hot & 3000 cold) But I did notice there
>>> is no voltage at the Inlet manifold heater terminal. Can anyone confirm
>>> if this should show battery voltage on ignition? I'm not sure how this
>>> operates, if it only comes on under a certain temp or should be on
>>> permanently.
>>
>> Thermo time switch will only apply power to the cold start injector under
>> about 7 deg C.
>
> I'm not sure this baby has a cold start injector, in fact it doesn't seem
> to have much at all compared to engine pics I've seen of other Audi 80's.
> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
> I've now had a look on Autodata and the only engine temperature related
> items I can see on this model are the coolant temp sensor (one for ecu &
> one for gauge), Intake air temp, manifold heater & O2 heater.
Ahhh, not a K /KE jet then!
Scrap all the above..
Either you have a failed intake heater, or the injector is gummy and
sticking. The latter would be my bet.
Get it in an ultrasonic bath for a good clean to start with.
Tim.
..
#32
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
"Redwood" <not@home.net> wrote in message
news:5iaq4kF3oenuvU1@mid.individual.net...
> "Tim.." <the.farm.no@spam.btinternet.com> wrote in message
> news:ZsydnaHOq61Ft13bRVnygAA@bt.com...
>>
>> "Redwood" <not@home.net> wrote in message
>> news:5ianguF3omc0kU1@mid.individual.net...
>>> "dave AKA vwdoc1" <vwdoc1@hotmail.com> wrote in message
>>> news:ghGvi.309$%Y7.74@nlpi069.nbdc.sbc.com...
>>>> Coolant Temperature Sensor for the Fuel Injection
>>>> Loose clamps on the Intake Manifold Boot.
>>>> Bad Fuel Injector Seals allowing air by them until they warm up and
>>>> expand.
>>>> Possibly a fuel pressure problem.
>>>> To name a few possibilities.
>>>>
>>>> Did it have this problem BEFORE the full service?
>>>
>>> Thanks Dave, yes according to the owner it has been a bit stuttery on
>>> initial start off for some time. I checked the ecu temp sensor which is
>>> giving normal readings (300ohm hot & 3000 cold) But I did notice there
>>> is no voltage at the Inlet manifold heater terminal. Can anyone confirm
>>> if this should show battery voltage on ignition? I'm not sure how this
>>> operates, if it only comes on under a certain temp or should be on
>>> permanently.
>>
>> Thermo time switch will only apply power to the cold start injector under
>> about 7 deg C.
>
> I'm not sure this baby has a cold start injector, in fact it doesn't seem
> to have much at all compared to engine pics I've seen of other Audi 80's.
> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
> I've now had a look on Autodata and the only engine temperature related
> items I can see on this model are the coolant temp sensor (one for ecu &
> one for gauge), Intake air temp, manifold heater & O2 heater.
Ahhh, not a K /KE jet then!
Scrap all the above..
Either you have a failed intake heater, or the injector is gummy and
sticking. The latter would be my bet.
Get it in an ultrasonic bath for a good clean to start with.
Tim.
..
#33
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
"Redwood" <not@home.net> wrote in message
news:5iaq4kF3oenuvU1@mid.individual.net...
> "Tim.." <the.farm.no@spam.btinternet.com> wrote in message
> news:ZsydnaHOq61Ft13bRVnygAA@bt.com...
>>
>> "Redwood" <not@home.net> wrote in message
>> news:5ianguF3omc0kU1@mid.individual.net...
>>> "dave AKA vwdoc1" <vwdoc1@hotmail.com> wrote in message
>>> news:ghGvi.309$%Y7.74@nlpi069.nbdc.sbc.com...
>>>> Coolant Temperature Sensor for the Fuel Injection
>>>> Loose clamps on the Intake Manifold Boot.
>>>> Bad Fuel Injector Seals allowing air by them until they warm up and
>>>> expand.
>>>> Possibly a fuel pressure problem.
>>>> To name a few possibilities.
>>>>
>>>> Did it have this problem BEFORE the full service?
>>>
>>> Thanks Dave, yes according to the owner it has been a bit stuttery on
>>> initial start off for some time. I checked the ecu temp sensor which is
>>> giving normal readings (300ohm hot & 3000 cold) But I did notice there
>>> is no voltage at the Inlet manifold heater terminal. Can anyone confirm
>>> if this should show battery voltage on ignition? I'm not sure how this
>>> operates, if it only comes on under a certain temp or should be on
>>> permanently.
>>
>> Thermo time switch will only apply power to the cold start injector under
>> about 7 deg C.
>
> I'm not sure this baby has a cold start injector, in fact it doesn't seem
> to have much at all compared to engine pics I've seen of other Audi 80's.
> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
> I've now had a look on Autodata and the only engine temperature related
> items I can see on this model are the coolant temp sensor (one for ecu &
> one for gauge), Intake air temp, manifold heater & O2 heater.
Ahhh, not a K /KE jet then!
Scrap all the above..
Either you have a failed intake heater, or the injector is gummy and
sticking. The latter would be my bet.
Get it in an ultrasonic bath for a good clean to start with.
Tim.
..
#34
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
"Tim.." <the.farm.no@spam.btinternet.com> wrote in message
news:COedncRQDsO5Kl3bRVnyuwA@bt.com...
>
> "Redwood" <not@home.net> wrote in message
> news:5iaq4kF3oenuvU1@mid.individual.net...
>> I'm not sure this baby has a cold start injector, in fact it doesn't seem
>> to have much at all compared to engine pics I've seen of other Audi 80's.
>> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
>> I've now had a look on Autodata and the only engine temperature related
>> items I can see on this model are the coolant temp sensor (one for ecu &
>> one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
The more I read the more I'm convinced it is the manifold heater "hedgehog".
There is no voltage showing at the wire connecting to the heater plug.
According to Autodata there should be battery voltage on ignition but there
isn't. However, the volt meter does detect a trickle for a split second as
I switch on ignition so I'm guessing that the wiring is in order and the
problem is the heater relay. Anyone know which relay it is and is there a
way to test it?
news:COedncRQDsO5Kl3bRVnyuwA@bt.com...
>
> "Redwood" <not@home.net> wrote in message
> news:5iaq4kF3oenuvU1@mid.individual.net...
>> I'm not sure this baby has a cold start injector, in fact it doesn't seem
>> to have much at all compared to engine pics I've seen of other Audi 80's.
>> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
>> I've now had a look on Autodata and the only engine temperature related
>> items I can see on this model are the coolant temp sensor (one for ecu &
>> one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
The more I read the more I'm convinced it is the manifold heater "hedgehog".
There is no voltage showing at the wire connecting to the heater plug.
According to Autodata there should be battery voltage on ignition but there
isn't. However, the volt meter does detect a trickle for a split second as
I switch on ignition so I'm guessing that the wiring is in order and the
problem is the heater relay. Anyone know which relay it is and is there a
way to test it?
#35
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
"Tim.." <the.farm.no@spam.btinternet.com> wrote in message
news:COedncRQDsO5Kl3bRVnyuwA@bt.com...
>
> "Redwood" <not@home.net> wrote in message
> news:5iaq4kF3oenuvU1@mid.individual.net...
>> I'm not sure this baby has a cold start injector, in fact it doesn't seem
>> to have much at all compared to engine pics I've seen of other Audi 80's.
>> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
>> I've now had a look on Autodata and the only engine temperature related
>> items I can see on this model are the coolant temp sensor (one for ecu &
>> one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
The more I read the more I'm convinced it is the manifold heater "hedgehog".
There is no voltage showing at the wire connecting to the heater plug.
According to Autodata there should be battery voltage on ignition but there
isn't. However, the volt meter does detect a trickle for a split second as
I switch on ignition so I'm guessing that the wiring is in order and the
problem is the heater relay. Anyone know which relay it is and is there a
way to test it?
news:COedncRQDsO5Kl3bRVnyuwA@bt.com...
>
> "Redwood" <not@home.net> wrote in message
> news:5iaq4kF3oenuvU1@mid.individual.net...
>> I'm not sure this baby has a cold start injector, in fact it doesn't seem
>> to have much at all compared to engine pics I've seen of other Audi 80's.
>> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
>> I've now had a look on Autodata and the only engine temperature related
>> items I can see on this model are the coolant temp sensor (one for ecu &
>> one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
The more I read the more I'm convinced it is the manifold heater "hedgehog".
There is no voltage showing at the wire connecting to the heater plug.
According to Autodata there should be battery voltage on ignition but there
isn't. However, the volt meter does detect a trickle for a split second as
I switch on ignition so I'm guessing that the wiring is in order and the
problem is the heater relay. Anyone know which relay it is and is there a
way to test it?
#36
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
"Tim.." <the.farm.no@spam.btinternet.com> wrote in message
news:COedncRQDsO5Kl3bRVnyuwA@bt.com...
>
> "Redwood" <not@home.net> wrote in message
> news:5iaq4kF3oenuvU1@mid.individual.net...
>> I'm not sure this baby has a cold start injector, in fact it doesn't seem
>> to have much at all compared to engine pics I've seen of other Audi 80's.
>> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
>> I've now had a look on Autodata and the only engine temperature related
>> items I can see on this model are the coolant temp sensor (one for ecu &
>> one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
The more I read the more I'm convinced it is the manifold heater "hedgehog".
There is no voltage showing at the wire connecting to the heater plug.
According to Autodata there should be battery voltage on ignition but there
isn't. However, the volt meter does detect a trickle for a split second as
I switch on ignition so I'm guessing that the wiring is in order and the
problem is the heater relay. Anyone know which relay it is and is there a
way to test it?
news:COedncRQDsO5Kl3bRVnyuwA@bt.com...
>
> "Redwood" <not@home.net> wrote in message
> news:5iaq4kF3oenuvU1@mid.individual.net...
>> I'm not sure this baby has a cold start injector, in fact it doesn't seem
>> to have much at all compared to engine pics I've seen of other Audi 80's.
>> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
>> I've now had a look on Autodata and the only engine temperature related
>> items I can see on this model are the coolant temp sensor (one for ecu &
>> one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
The more I read the more I'm convinced it is the manifold heater "hedgehog".
There is no voltage showing at the wire connecting to the heater plug.
According to Autodata there should be battery voltage on ignition but there
isn't. However, the volt meter does detect a trickle for a split second as
I switch on ignition so I'm guessing that the wiring is in order and the
problem is the heater relay. Anyone know which relay it is and is there a
way to test it?
#37
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
"Tim.." <the.farm.no@spam.btinternet.com> wrote in message
news:COedncRQDsO5Kl3bRVnyuwA@bt.com...
>
> "Redwood" <not@home.net> wrote in message
> news:5iaq4kF3oenuvU1@mid.individual.net...
>> I'm not sure this baby has a cold start injector, in fact it doesn't seem
>> to have much at all compared to engine pics I've seen of other Audi 80's.
>> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
>> I've now had a look on Autodata and the only engine temperature related
>> items I can see on this model are the coolant temp sensor (one for ecu &
>> one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
The more I read the more I'm convinced it is the manifold heater "hedgehog".
There is no voltage showing at the wire connecting to the heater plug.
According to Autodata there should be battery voltage on ignition but there
isn't. However, the volt meter does detect a trickle for a split second as
I switch on ignition so I'm guessing that the wiring is in order and the
problem is the heater relay. Anyone know which relay it is and is there a
way to test it?
news:COedncRQDsO5Kl3bRVnyuwA@bt.com...
>
> "Redwood" <not@home.net> wrote in message
> news:5iaq4kF3oenuvU1@mid.individual.net...
>> I'm not sure this baby has a cold start injector, in fact it doesn't seem
>> to have much at all compared to engine pics I've seen of other Audi 80's.
>> It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
>> I've now had a look on Autodata and the only engine temperature related
>> items I can see on this model are the coolant temp sensor (one for ecu &
>> one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
The more I read the more I'm convinced it is the manifold heater "hedgehog".
There is no voltage showing at the wire connecting to the heater plug.
According to Autodata there should be battery voltage on ignition but there
isn't. However, the volt meter does detect a trickle for a split second as
I switch on ignition so I'm guessing that the wiring is in order and the
problem is the heater relay. Anyone know which relay it is and is there a
way to test it?
#38
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
On 13 Aug, 20:48, "Tim.." <the.farm...@spam.btinternet.com> wrote:
> "Redwood" <n...@home.net> wrote in message
>
> news:5iaq4kF3oenuvU1@mid.individual.net...
>
>
>
> > "Tim.." <the.farm...@spam.btinternet.com> wrote in message
> >news:ZsydnaHOq61Ft13bRVnygAA@bt.com...
>
> >> "Redwood" <n...@home.net> wrote in message
> >>news:5ianguF3omc0kU1@mid.individual.net...
> >>> "dave AKA vwdoc1" <vwd...@hotmail.com> wrote in message
> >>>news:ghGvi.309$%Y7.74@nlpi069.nbdc.sbc.com...
> >>>> Coolant Temperature Sensor for the Fuel Injection
> >>>> Loose clamps on the Intake Manifold Boot.
> >>>> Bad Fuel Injector Seals allowing air by them until they warm up and
> >>>> expand.
> >>>> Possibly a fuel pressure problem.
> >>>> To name a few possibilities.
>
> >>>> Did it have this problem BEFORE the full service?
>
> >>> Thanks Dave, yes according to the owner it has been a bit stuttery on
> >>> initial start off for some time. I checked the ecu temp sensor which is
> >>> giving normal readings (300ohm hot & 3000 cold) But I did notice there
> >>> is no voltage at the Inlet manifold heater terminal. Can anyone confirm
> >>> if this should show battery voltage on ignition? I'm not sure how this
> >>> operates, if it only comes on under a certain temp or should be on
> >>> permanently.
>
> >> Thermo time switch will only apply power to the cold start injector under
> >> about 7 deg C.
>
> > I'm not sure this baby has a cold start injector, in fact it doesn't seem
> > to have much at all compared to engine pics I've seen of other Audi 80's.
> > It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
> > I've now had a look on Autodata and the only engine temperature related
> > items I can see on this model are the coolant temp sensor (one for ecu &
> > one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
>
> Tim.
> .
I was under the impression air intake heaters were for periods of
extended idling, not for cold starts.
> "Redwood" <n...@home.net> wrote in message
>
> news:5iaq4kF3oenuvU1@mid.individual.net...
>
>
>
> > "Tim.." <the.farm...@spam.btinternet.com> wrote in message
> >news:ZsydnaHOq61Ft13bRVnygAA@bt.com...
>
> >> "Redwood" <n...@home.net> wrote in message
> >>news:5ianguF3omc0kU1@mid.individual.net...
> >>> "dave AKA vwdoc1" <vwd...@hotmail.com> wrote in message
> >>>news:ghGvi.309$%Y7.74@nlpi069.nbdc.sbc.com...
> >>>> Coolant Temperature Sensor for the Fuel Injection
> >>>> Loose clamps on the Intake Manifold Boot.
> >>>> Bad Fuel Injector Seals allowing air by them until they warm up and
> >>>> expand.
> >>>> Possibly a fuel pressure problem.
> >>>> To name a few possibilities.
>
> >>>> Did it have this problem BEFORE the full service?
>
> >>> Thanks Dave, yes according to the owner it has been a bit stuttery on
> >>> initial start off for some time. I checked the ecu temp sensor which is
> >>> giving normal readings (300ohm hot & 3000 cold) But I did notice there
> >>> is no voltage at the Inlet manifold heater terminal. Can anyone confirm
> >>> if this should show battery voltage on ignition? I'm not sure how this
> >>> operates, if it only comes on under a certain temp or should be on
> >>> permanently.
>
> >> Thermo time switch will only apply power to the cold start injector under
> >> about 7 deg C.
>
> > I'm not sure this baby has a cold start injector, in fact it doesn't seem
> > to have much at all compared to engine pics I've seen of other Audi 80's.
> > It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
> > I've now had a look on Autodata and the only engine temperature related
> > items I can see on this model are the coolant temp sensor (one for ecu &
> > one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
>
> Tim.
> .
I was under the impression air intake heaters were for periods of
extended idling, not for cold starts.
#39
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
On 13 Aug, 20:48, "Tim.." <the.farm...@spam.btinternet.com> wrote:
> "Redwood" <n...@home.net> wrote in message
>
> news:5iaq4kF3oenuvU1@mid.individual.net...
>
>
>
> > "Tim.." <the.farm...@spam.btinternet.com> wrote in message
> >news:ZsydnaHOq61Ft13bRVnygAA@bt.com...
>
> >> "Redwood" <n...@home.net> wrote in message
> >>news:5ianguF3omc0kU1@mid.individual.net...
> >>> "dave AKA vwdoc1" <vwd...@hotmail.com> wrote in message
> >>>news:ghGvi.309$%Y7.74@nlpi069.nbdc.sbc.com...
> >>>> Coolant Temperature Sensor for the Fuel Injection
> >>>> Loose clamps on the Intake Manifold Boot.
> >>>> Bad Fuel Injector Seals allowing air by them until they warm up and
> >>>> expand.
> >>>> Possibly a fuel pressure problem.
> >>>> To name a few possibilities.
>
> >>>> Did it have this problem BEFORE the full service?
>
> >>> Thanks Dave, yes according to the owner it has been a bit stuttery on
> >>> initial start off for some time. I checked the ecu temp sensor which is
> >>> giving normal readings (300ohm hot & 3000 cold) But I did notice there
> >>> is no voltage at the Inlet manifold heater terminal. Can anyone confirm
> >>> if this should show battery voltage on ignition? I'm not sure how this
> >>> operates, if it only comes on under a certain temp or should be on
> >>> permanently.
>
> >> Thermo time switch will only apply power to the cold start injector under
> >> about 7 deg C.
>
> > I'm not sure this baby has a cold start injector, in fact it doesn't seem
> > to have much at all compared to engine pics I've seen of other Audi 80's.
> > It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
> > I've now had a look on Autodata and the only engine temperature related
> > items I can see on this model are the coolant temp sensor (one for ecu &
> > one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
>
> Tim.
> .
I was under the impression air intake heaters were for periods of
extended idling, not for cold starts.
> "Redwood" <n...@home.net> wrote in message
>
> news:5iaq4kF3oenuvU1@mid.individual.net...
>
>
>
> > "Tim.." <the.farm...@spam.btinternet.com> wrote in message
> >news:ZsydnaHOq61Ft13bRVnygAA@bt.com...
>
> >> "Redwood" <n...@home.net> wrote in message
> >>news:5ianguF3omc0kU1@mid.individual.net...
> >>> "dave AKA vwdoc1" <vwd...@hotmail.com> wrote in message
> >>>news:ghGvi.309$%Y7.74@nlpi069.nbdc.sbc.com...
> >>>> Coolant Temperature Sensor for the Fuel Injection
> >>>> Loose clamps on the Intake Manifold Boot.
> >>>> Bad Fuel Injector Seals allowing air by them until they warm up and
> >>>> expand.
> >>>> Possibly a fuel pressure problem.
> >>>> To name a few possibilities.
>
> >>>> Did it have this problem BEFORE the full service?
>
> >>> Thanks Dave, yes according to the owner it has been a bit stuttery on
> >>> initial start off for some time. I checked the ecu temp sensor which is
> >>> giving normal readings (300ohm hot & 3000 cold) But I did notice there
> >>> is no voltage at the Inlet manifold heater terminal. Can anyone confirm
> >>> if this should show battery voltage on ignition? I'm not sure how this
> >>> operates, if it only comes on under a certain temp or should be on
> >>> permanently.
>
> >> Thermo time switch will only apply power to the cold start injector under
> >> about 7 deg C.
>
> > I'm not sure this baby has a cold start injector, in fact it doesn't seem
> > to have much at all compared to engine pics I've seen of other Audi 80's.
> > It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
> > I've now had a look on Autodata and the only engine temperature related
> > items I can see on this model are the coolant temp sensor (one for ecu &
> > one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
>
> Tim.
> .
I was under the impression air intake heaters were for periods of
extended idling, not for cold starts.
#40
Guest
Posts: n/a
Re: Audi 80 splutters after cold start?
On 13 Aug, 20:48, "Tim.." <the.farm...@spam.btinternet.com> wrote:
> "Redwood" <n...@home.net> wrote in message
>
> news:5iaq4kF3oenuvU1@mid.individual.net...
>
>
>
> > "Tim.." <the.farm...@spam.btinternet.com> wrote in message
> >news:ZsydnaHOq61Ft13bRVnygAA@bt.com...
>
> >> "Redwood" <n...@home.net> wrote in message
> >>news:5ianguF3omc0kU1@mid.individual.net...
> >>> "dave AKA vwdoc1" <vwd...@hotmail.com> wrote in message
> >>>news:ghGvi.309$%Y7.74@nlpi069.nbdc.sbc.com...
> >>>> Coolant Temperature Sensor for the Fuel Injection
> >>>> Loose clamps on the Intake Manifold Boot.
> >>>> Bad Fuel Injector Seals allowing air by them until they warm up and
> >>>> expand.
> >>>> Possibly a fuel pressure problem.
> >>>> To name a few possibilities.
>
> >>>> Did it have this problem BEFORE the full service?
>
> >>> Thanks Dave, yes according to the owner it has been a bit stuttery on
> >>> initial start off for some time. I checked the ecu temp sensor which is
> >>> giving normal readings (300ohm hot & 3000 cold) But I did notice there
> >>> is no voltage at the Inlet manifold heater terminal. Can anyone confirm
> >>> if this should show battery voltage on ignition? I'm not sure how this
> >>> operates, if it only comes on under a certain temp or should be on
> >>> permanently.
>
> >> Thermo time switch will only apply power to the cold start injector under
> >> about 7 deg C.
>
> > I'm not sure this baby has a cold start injector, in fact it doesn't seem
> > to have much at all compared to engine pics I've seen of other Audi 80's.
> > It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
> > I've now had a look on Autodata and the only engine temperature related
> > items I can see on this model are the coolant temp sensor (one for ecu &
> > one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
>
> Tim.
> .
I was under the impression air intake heaters were for periods of
extended idling, not for cold starts.
> "Redwood" <n...@home.net> wrote in message
>
> news:5iaq4kF3oenuvU1@mid.individual.net...
>
>
>
> > "Tim.." <the.farm...@spam.btinternet.com> wrote in message
> >news:ZsydnaHOq61Ft13bRVnygAA@bt.com...
>
> >> "Redwood" <n...@home.net> wrote in message
> >>news:5ianguF3omc0kU1@mid.individual.net...
> >>> "dave AKA vwdoc1" <vwd...@hotmail.com> wrote in message
> >>>news:ghGvi.309$%Y7.74@nlpi069.nbdc.sbc.com...
> >>>> Coolant Temperature Sensor for the Fuel Injection
> >>>> Loose clamps on the Intake Manifold Boot.
> >>>> Bad Fuel Injector Seals allowing air by them until they warm up and
> >>>> expand.
> >>>> Possibly a fuel pressure problem.
> >>>> To name a few possibilities.
>
> >>>> Did it have this problem BEFORE the full service?
>
> >>> Thanks Dave, yes according to the owner it has been a bit stuttery on
> >>> initial start off for some time. I checked the ecu temp sensor which is
> >>> giving normal readings (300ohm hot & 3000 cold) But I did notice there
> >>> is no voltage at the Inlet manifold heater terminal. Can anyone confirm
> >>> if this should show battery voltage on ignition? I'm not sure how this
> >>> operates, if it only comes on under a certain temp or should be on
> >>> permanently.
>
> >> Thermo time switch will only apply power to the cold start injector under
> >> about 7 deg C.
>
> > I'm not sure this baby has a cold start injector, in fact it doesn't seem
> > to have much at all compared to engine pics I've seen of other Audi 80's.
> > It's the 2.0 SPI Mono-Motronic and it all seems very sparse underneath.
> > I've now had a look on Autodata and the only engine temperature related
> > items I can see on this model are the coolant temp sensor (one for ecu &
> > one for gauge), Intake air temp, manifold heater & O2 heater.
>
> Ahhh, not a K /KE jet then!
>
> Scrap all the above..
>
> Either you have a failed intake heater, or the injector is gummy and
> sticking. The latter would be my bet.
>
> Get it in an ultrasonic bath for a good clean to start with.
>
> Tim.
> .
I was under the impression air intake heaters were for periods of
extended idling, not for cold starts.