Cold weather sensor?

[Frazerb]

Hi,

Does anyone know if the S2 has a cold weather sensor and if so where it is.

My indie thinks this might be the source of my Kangaroo Problems when cool but typically for the past 24hrs since he has had it he has found no problems.

Any help appreciated as always,

Cheers....Frazer

 

[zcacogp]

Frazer,

Sorry to be rude, but if your indie doesn't know whether an S2 has a cold start sensor then you need a new indie ... I don't know the answer to your question, but would expect any indie worth his salt/hourly rate to know immediately, and where to find it, and the symptoms of it failing.

If the S2 has one (it may work from the coolant temperature feed to the ECU) then it will probably drive a seperate injector, which is another point of failure. Problems with this system would also go away once the engine is up to temperature.


Oli.

 

[Frazerb]

Have you ever tried to get a good mechanic for Porsches in DUNDEE???? Ain't too many around. The guys I use know the mark well, especialy the aircooled range, and is presuming there is a similar sensor somewhere on the S2.

I agree with what you are saying but he is trying to save me some cost and time by his team not spending hours looking for a fault like this. I did say I would ask the forum if anyone knew anything about the sensors.

Thanks for the advise however - I really appreciate it as a non technical Porsche fan.

Cheers Oli,
Frazer

 

[zcacogp]

Frazer,

Sorry - didn't realise you were that far north!

I can't answer your question, but the manuals on Rick Cannell's site will have wiring diagrams, which will have the answer.

BUT, as a general description, VW's of that era tended to have a second temperature sensor in the waterways somewhere, which simply turned on an additional injector to throw some more motion-lotion into the inlet manifolds when it was a bit nippster. The temperature sensor was the usual point of failure, but the wiring could also fail as could the injector (usually blocked).

More modern cars have the whole thing driven from the single temperature sensor which tells the ECU what temperature the water is at. The ECU then decides what to do at a given temperature - so it could include turning on the fan or enrichening the mixture or changing the throttle response curve.

I don't know how sophisticated the S2 is in this respect, but suspect you are looking at the former (cheaper to fix, easier to diagnose) than the latter. (If it is the latter, you would expect to see a number of other temperature-related problems with the car as well, as a number of things will appear to go wrong at the same time.)

Either way, if the kangaroo-hops are related to temperature sensor issues, they should go away once the car is up to normal operating temperature. If they don't, the diagnosis is wrong.


Oli.

 

[pauljmcnulty]

Have you ever tried to get a good mechanic for Porsches in DUNDEE???? Ain't too many around.

Hi Frazer,

Have you tried a call to the technical advisor? Porschefile is your friend!

 

[Diver944]

Been tring to find a picture all afternoon and failed []

The engine temp sensor is at the front of the block and half way down, mine is coloured blue.

Mine failed open a few years ago and made the car run rich everywhere because the ECU thought the engine was stone cold all the time. Heavy acceleration resulted in stuttering and clouds of black smoke

 

[zcacogp]

The sensor was the most common thing to fail in VW-world, and I'll bet that it is the same part fitted to 944's of this era.

I think the replacements were of the order of £3 or so. And they are dead easy to change.


Oli.