Hi,

Does anyone know if there is a low cost fault code reader for a 1998 Renault
Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until ecu
is reset.

Thanks to all,

Derek

"Derek"  wrote in message 
news:g8n18l$8tr$1@energise.enta.net...
> Hi,
>
> Does anyone know if there is a low cost fault code reader for a 1998 
> Renault
> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until ecu
> is reset.
>
> Thanks to all,
>
> Derek

it'll have obdII  try argos product code 740/2742  , it'll be basic but 
should be enough for what you want.

"reg"  wrote in message news:g8n38q$bt$1@aioe.org...
>
> "Derek"  wrote in message 
> news:g8n18l$8tr$1@energise.enta.net...
>> Hi,
>>
>> Does anyone know if there is a low cost fault code reader for a 1998 
>> Renault
>> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until 
>> ecu
>> is reset.
>>
>> Thanks to all,
>>
>> Derek
>
> it'll have obdII  try argos product code 740/2742  , it'll be basic but 
> should be enough for what you want.

opps meant to include a link http://tinyurl.com/67ppfx

On Fri, 22 Aug 2008 20:23:17 +0100, reg  wrote:

> "reg"  wrote in message news:g8n38q$bt$1@aioe.org...
>>
>> "Derek"  wrote in message
>> news:g8n18l$8tr$1@energise.enta.net...
>>> Hi,
>>>
>>> Does anyone know if there is a low cost fault code reader for a 1998
>>> Renault
>>> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until
>>> ecu
>>> is reset.
>>>
>>> Thanks to all,
>>>
>>> Derek
>>
>> it'll have obdII  try argos product code 740/2742  , it'll be basic but
>> should be enough for what you want.
>
> opps meant to include a link http://tinyurl.com/67ppfx
>
>

Not necessarily, as it's the dTi.

"Duncan Wood"  wrote in message 
news:op.uga0e01dhaghkf@lucy...
> On Fri, 22 Aug 2008 20:23:17 +0100, reg  wrote:
>
>> "reg"  wrote in message news:g8n38q$bt$1@aioe.org...
>>>
>>> "Derek"  wrote in message
>>> news:g8n18l$8tr$1@energise.enta.net...
>>>> Hi,
>>>>
>>>> Does anyone know if there is a low cost fault code reader for a 1998
>>>> Renault
>>>> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until
>>>> ecu
>>>> is reset.
>>>>
>>>> Thanks to all,
>>>>
>>>> Derek
>>>
>>> it'll have obdII  try argos product code 740/2742  , it'll be basic but
>>> should be enough for what you want.
>>
>> opps meant to include a link http://tinyurl.com/67ppfx
>>
>>
>
> Not necessarily, as it's the dTi.

If it's >1996, as I understand* it needs to have OBD-II...

*and I'm often wrong. ;-)

-- 
The DervMan
www.dervman.com

"Duncan Wood"  wrote in message 
news:op.uga0e01dhaghkf@lucy...
> On Fri, 22 Aug 2008 20:23:17 +0100, reg  wrote:
>
>> "reg"  wrote in message news:g8n38q$bt$1@aioe.org...
>>>
>>> "Derek"  wrote in message
>>> news:g8n18l$8tr$1@energise.enta.net...
>>>> Hi,
>>>>
>>>> Does anyone know if there is a low cost fault code reader for a 1998
>>>> Renault
>>>> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until
>>>> ecu
>>>> is reset.
>>>>
>>>> Thanks to all,
>>>>
>>>> Derek
>>>
>>> it'll have obdII  try argos product code 740/2742  , it'll be basic but
>>> should be enough for what you want.
>>
>> opps meant to include a link http://tinyurl.com/67ppfx
>>
>>
>
> Not necessarily, as it's the dTi.

If you can handle a soldering iron, Elektor magazine did a very good OBD II 
analyser a few issues back, that is available in kit form for a very 
reasonable price, which includes the case, and the lead. It has auto 
protocol seek, and an LCD display which reports fault codes in plain 
english.

http://www.elektor-electronics.co.uk/search.1899.lynkx?searchValue=OBD+analyser&x=4&y=5

Arfa

"Derek"  wrote in message 
news:g8n18l$8tr$1@energise.enta.net...
> Hi,
>
> Does anyone know if there is a low cost fault code reader for a 1998 
> Renault
> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until ecu
> is reset.


when exactly does it enter LOS mode?

Turbo actuators are sods on these- they over-boost then the ECU goes into 
LOS.

Tim..

On Fri, 22 Aug 2008 23:12:43 +0100, DervMan  wrote:

> "Duncan Wood"  wrote in message
> news:op.uga0e01dhaghkf@lucy...
>> On Fri, 22 Aug 2008 20:23:17 +0100, reg  wrote:
>>
>>> "reg"  wrote in message news:g8n38q$bt$1@aioe.org...
>>>>
>>>> "Derek"  wrote in message
>>>> news:g8n18l$8tr$1@energise.enta.net...
>>>>> Hi,
>>>>>
>>>>> Does anyone know if there is a low cost fault code reader for a 1998
>>>>> Renault
>>>>> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode  
>>>>> until
>>>>> ecu
>>>>> is reset.
>>>>>
>>>>> Thanks to all,
>>>>>
>>>>> Derek
>>>>
>>>> it'll have obdII  try argos product code 740/2742  , it'll be basic  
>>>> but
>>>> should be enough for what you want.
>>>
>>> opps meant to include a link http://tinyurl.com/67ppfx
>>>
>>>
>>
>> Not necessarily, as it's the dTi.
>
> If it's >1996, as I understand* it needs to have OBD-II...
>
> *and I'm often wrong. ;-)
>


2003 for diesels

Tim.. wrote:

> 
> "Derek"  wrote in message
> news:g8n18l$8tr$1@energise.enta.net...
>> Hi,
>>
>> Does anyone know if there is a low cost fault code reader for a 1998
>> Renault
>> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until
>> ecu is reset.
> 
> 
> when exactly does it enter LOS mode?
> 
> Turbo actuators are sods on these- they over-boost then the ECU goes into
> LOS.
> 
> Tim..

Thanks to all who've replied so far.

I'm tempted to go for the Argos one since if it doesn't work they'll take it
back - I didn't define what I meant by low cost - just not Renault's
full 'testbook' or whatever they call it! The 100 quid version seems to be
a better buy as it does 'live' data?

When I'm saying it goes to LOS, it has the symptoms of that (see below), but
no dash warning light (bulb is working!). 

I've been having a good look at things. The engine 'sounds' fine and
smooth - smooth is funny term for a Renault dTi but hopefully YKWIM! Engine
appears to be limited to just over 3000rpm, and under load runs out of
breath before that - clearly no turbo happening. Last night removing 
battery power for a while would restore normal engine behaviour, until
driven for a short while. It MAY well have been after some boost that this
happened, but it now seems to be stuck in the 'limited' state.

I'm trying to use Haynes 3395 for this, but it doesn't seem good for the F9Q
engine,in particular. I'm not seeing a lot of evidence of vacuum activity
within the engine, but the brakes seem fine, so am going to look at this
next. An intermittant problem doesn't suggest that a hose has come off, but
I suppose there could be a split somewhere? The normal 'sigh' noise you
hear on switching off is not happening.

Turbo actuator - I assume this is the wastegate actuator on the dTi? Is it
vacuum powered via a solenoid? How would I test it (fault code reader?!)
Access looks a little awkward as it's round the back of the engine under
the dashboard - remove air hoses, I assume?

Many thanks,

Derek

Derek wrote:

> Tim.. wrote:
> 
>> 
>> "Derek"  wrote in message
>> news:g8n18l$8tr$1@energise.enta.net...
>>> Hi,
>>>
>>> Does anyone know if there is a low cost fault code reader for a 1998
>>> Renault
>>> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until
>>> ecu is reset.
>> 
>> 
>> when exactly does it enter LOS mode?
>> 
>> Turbo actuators are sods on these- they over-boost then the ECU goes into
>> LOS.
>> 
>> Tim..
> 
> Thanks to all who've replied so far.
> 
> I'm tempted to go for the Argos one since if it doesn't work they'll take
> it back - I didn't define what I meant by low cost - just not Renault's
> full 'testbook' or whatever they call it! The 100 quid version seems to be
> a better buy as it does 'live' data?
> 
> When I'm saying it goes to LOS, it has the symptoms of that (see below),
> but no dash warning light (bulb is working!).
> 
> I've been having a good look at things. The engine 'sounds' fine and
> smooth - smooth is funny term for a Renault dTi but hopefully YKWIM!
> Engine appears to be limited to just over 3000rpm, and under load runs out
> of breath before that - clearly no turbo happening. Last night removing
> battery power for a while would restore normal engine behaviour, until
> driven for a short while. It MAY well have been after some boost that this
> happened, but it now seems to be stuck in the 'limited' state.
> 
> I'm trying to use Haynes 3395 for this, but it doesn't seem good for the
> F9Q engine,in particular. I'm not seeing a lot of evidence of vacuum
> activity within the engine, but the brakes seem fine, so am going to look
> at this next. An intermittant problem doesn't suggest that a hose has come
> off, but I suppose there could be a split somewhere? The normal 'sigh'
> noise you hear on switching off is not happening.
> 
> Turbo actuator - I assume this is the wastegate actuator on the dTi? Is it
> vacuum powered via a solenoid? How would I test it (fault code reader?!)
> Access looks a little awkward as it's round the back of the engine under
> the dashboard - remove air hoses, I assume?
> 
> Many thanks,
> 
> Derek

OK, no splits that I can find in the vacuum hoses. There is a large bore
hose and a very small one coming from the camshaft driven vacuum pump. if I
clamp the main hose with pliers, and remove the small hose (which goes to
the EGR solenoid), I don't feel much if any vacuum when I block the small
hose with my finger - should I? Haynes; "As a guide, after one minute, a
minimum of 500 mm Hg should be recorded." at idle with a gauge on the main
hose.

Is it reasonable to conclude that the pump is the culprit, or could there be
other explanations?

Thanks

Derek

"Derek"  wrote in message 
news:g8p23o$q0p$1@energise.enta.net...
> Derek wrote:
>
>> Tim.. wrote:
>>
>>>
>>> "Derek"  wrote in message
>>> news:g8n18l$8tr$1@energise.enta.net...
>>>> Hi,
>>>>
>>>> Does anyone know if there is a low cost fault code reader for a 1998
>>>> Renault
>>>> Megane Scenic RT dTi 1.9 engine. It keeps going into 'limp' mode until
>>>> ecu is reset.
>>>
>>>
>>> when exactly does it enter LOS mode?
>>>
>>> Turbo actuators are sods on these- they over-boost then the ECU goes 
>>> into
>>> LOS.
>>>
>>> Tim..
>>
>> Thanks to all who've replied so far.
>>
>> I'm tempted to go for the Argos one since if it doesn't work they'll take
>> it back - I didn't define what I meant by low cost - just not Renault's
>> full 'testbook' or whatever they call it! The 100 quid version seems to 
>> be
>> a better buy as it does 'live' data?
>>
>> When I'm saying it goes to LOS, it has the symptoms of that (see below),
>> but no dash warning light (bulb is working!).
>>
>> I've been having a good look at things. The engine 'sounds' fine and
>> smooth - smooth is funny term for a Renault dTi but hopefully YKWIM!
>> Engine appears to be limited to just over 3000rpm, and under load runs 
>> out
>> of breath before that - clearly no turbo happening. Last night removing
>> battery power for a while would restore normal engine behaviour, until
>> driven for a short while. It MAY well have been after some boost that 
>> this
>> happened, but it now seems to be stuck in the 'limited' state.
>>
>> I'm trying to use Haynes 3395 for this, but it doesn't seem good for the
>> F9Q engine,in particular. I'm not seeing a lot of evidence of vacuum
>> activity within the engine, but the brakes seem fine, so am going to look
>> at this next. An intermittant problem doesn't suggest that a hose has 
>> come
>> off, but I suppose there could be a split somewhere? The normal 'sigh'
>> noise you hear on switching off is not happening.
>>
>> Turbo actuator - I assume this is the wastegate actuator on the dTi? Is 
>> it
>> vacuum powered via a solenoid? How would I test it (fault code reader?!)
>> Access looks a little awkward as it's round the back of the engine under
>> the dashboard - remove air hoses, I assume?
>>
>> Many thanks,
>>
>> Derek
>
> OK, no splits that I can find in the vacuum hoses. There is a large bore
> hose and a very small one coming from the camshaft driven vacuum pump. if 
> I
> clamp the main hose with pliers, and remove the small hose (which goes to
> the EGR solenoid), I don't feel much if any vacuum when I block the small
> hose with my finger - should I? Haynes; "As a guide, after one minute, a
> minimum of 500 mm Hg should be recorded." at idle with a gauge on the main
> hose.
>
> Is it reasonable to conclude that the pump is the culprit, or could there 
> be
> other explanations?

Likely.
With the engine running, you should feel noticable vacuum on the end of the 
pipe from the pump, but a leaking brake servo could also be the cause.

Easiest way to check, is feel how much vacuum you get at the small pipe with 
the servo connected, then disconnect the main pipe from the servo. Block the 
big pipe with one finger, then feel how much vacuum you get on the small 
pipe. If you get noticeably more on the small pipe, then the servo is the 
culprit.

Of course, the proper way to check would be using a vacuum gauge.