What Does An Ecu Temp Sensor Doe?

[dk73 1]

Hi,

 

As above just wondering what exactly an ecu temp sensor does.

 

If you can get back to me on this because ive starting problems.

[welshpug 1,657]

tells the ecu the temperature of the coolant.

[dk73 1]

tells the ecu the temperature of the coolant.

 

Cheers welshpug,

 

Im thinking could this be telling the ecu its cold all the time?

 

Shes running a bit rich, so maybe when shes warm shes over fueling because of the sensor and then takes a while to start?

 

How do i find it?

 

Where is it pal?

 

Could i be right about this?

[DrSarty 90 1 Cars]

On an Mi (and perhaps an 8V too), it's screwed into the side of the thermostat housing, and can be a light blue or green plastic electrical connection for one of those junior power timer/AMP clip on connections. The female plug has a metal clip on it, and it'll be a 2-pin connection.

 

About £15 to £25. With the engine cool, just get a big towel to bung the hole when you screw the old one out, make sure you have a new copper sealing washer and screw the new one in.

 

I can't say it'll solve your problem but it's a very common cause of running issues, as quite correctly it could be telling porkies to the ECU about the engine temp which in turn will mess up your fuelling.

 

Worth a try chap.

Edited July 5, 2009 by DrSarty

[dk73 1]

On an Mi (and perhaps an 8V too), it's screwed into the side of the thermostat housing, and can be a light blue or green plastic electrical connection for one of those junior power timer/AMP clip on connections. The female plug has a metal clip on it, and it'll be a 2-pin connection.

 

About £15 to £25. With the engine cool, just get a big towel to bung the hole when you screw the old one out, make sure you have a new copper sealing washer and screw the new one in.

 

I can't say it'll solve your problem but it's a very common cause of running issues, as quite correctly it could be telling porkies to the ECU about the engine temp which in turn will mess up your fuelling.

 

Worth a try chap.

 

 

Does gsf do them?

 

Cheers Dr.Sarty.

[DrSarty 90 1 Cars]

What engine is it then.....?

[dk73 1]

What engine is it then.....?

 

Standard 1.9 gti, i think its out of an H-plate?

[munster 0]

Your local motor factors will probably have one.

[DrSarty 90 1 Cars]

Standard 1.9 gti, i think its out of an H-plate?

 

Item 15.

 

I'd go main dealer simply because I don't know if GSF sell them.

[dk73 1]

Your local motor factors will probably have one.

 

Cheers guys,

 

I can now say it isnt the ecu temp sensor it six hours driving old.

 

Ive just contacted the last owner of the engine so its not that?

[welshpug 1,657]

gsf do sell them I've heard, under a BMW listing for something like an E30, quite a few of them use Jetronic, have a search, there's been mention a few times of the Bosch part number.

[dk73 1]

gsf do sell them I've heard, under a BMW listing for something like an E30, quite a few of them use Jetronic, have a search, there's been mention a few times of the Bosch part number.

 

Ok welshpug,

 

But now ive got in touch with the last owner of the engine and he says its had a new one.

 

About six hours old in driving terms,

 

Im confused its got to be the fuel pump?

[djinuk 2]

yea as confirmed the ecu temp senders new, (probably still nice and shiny) i only changed it as i had a friend at pug and it worked out cheap so i got that and a few other bits (manfiold gaskets etc), hope you sort it man, was always quick to start in my car.. could it be air flow meter related ?

[dk73 1]

yea as confirmed the ecu temp senders new, (probably still nice and shiny) i only changed it as i had a friend at pug and it worked out cheap so i got that and a few other bits (manfiold gaskets etc), hope you sort it man, was always quick to start in my car.. could it be air flow meter related ?

 

Cheers bud,

 

Its funny you should say that,

 

Ive had some extra work done to my car a goodlad that i know,

 

She was running rich, so he put the probe up the exhaust,

 

 

She was above the 2 mark, tryed with the adjust and only went down to 1.8?

 

He said then could be your airflow meter?

[GLPoomobile 958]

The sensor may be new, but that doesn't mean the ECU is getting the right signal. If the wiring or the connector is duff between the sensor and the ECU, then the ECU may still be getting the wrong signal (or none at all) causing the overfuelling.

 

Would be worth back probing the necessary ECU pins to find out what values it is seeing from the sensor.

 

Or it could be something else causing the overfuelling...........

[hcmini1989 16]

next time it doesnt start unplug 2 0f the injectors and see if it starts if it does then its overfueling probably due to the ecu temp sensor .you can test the component it self aswell just because its new doe`snt mean it could`nt be sh*ged i di the clutch on my mi16 and mine wouldnt start when warm after i refitted the gearbox but the reverse lights came on when it got hot. i had gotten the plugs mixed up so is it possible you`ve got them wired up wrong if you have a multi meter i can the resistance values for you to test the sensor