Hi guys

I have an EMS computer in the datsun. Now i have a faulty temp sensor. Its reading 235 degrese engine temp when the car is off. It will not spark. I have been told that it is possibly because there is no map in the computer to read 235 degrese.

I am going to take the sensor out in the morning and head to SWR to see if they have a spare. I have been told because it is a modified car that the sensor might not be standard either. Is there normally some sort of model number on it that can tell me? If not and i get the wrong one i am going to have to reprogram my computer to match the new sensor right?

My question after that.. is there anyone out there who knows how to change the settings? I have the handset for the EMS but i dont know how it really works.. maybe i need the computer program and laptop to change it??

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- Jase -
1971 Datsun 1600 P510 - Very slow project

Ok I have just got the part out and now after looking at other pictures of temp sensors I am wondering if it is the temp sensor.. I have included some photos.



this is the part that I think is faulty. It goes under the thermostat there in the picture were you see coolant coming out of. There were 2 wires coming out of it at one stage.

Is the water temp the one further around to the right? With what looks like 2 nuts.



Im sorry if this seems like a stupid question.

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- Jase -
1971 Datsun 1600 P510 - Very slow project

Ok I went to SWR this morning. He didnt have anything to help me out.

I tried EMS directly but I dont think they are open, they didnt answer their phone. I have emailed EMS and waiting on a reply. It looks like this temp sensor is not a standard one. So thats something I am going to have to attempt to source if EMS cannot help. I have researched and it looks like any temp sensor can be programmed into the ECU so if EMS do not have the correct part I will have to try and program another sensor into it. yikes.

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- Jase -
1971 Datsun 1600 P510 - Very slow project

Reasonably sure that EMS will be able to supply what you need.
http://www.emsefi.com/emsefi/index.php/ ... l=&start=2

$40

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Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

The sensor in the pic on the EMS website looks exactly like a Nissan RB series and CA18DET temp sensor. However the sensor in your pic looks to be a GM sensor. It seems half of it is missing though. Do you have the plug from the top of the sensor? If so post a pic of it and i'll be able to tell you what it is. As you said you can program the EMS for just about any sensor however you need to know the min and max resistance values. Without these forget about it. Having the ECU seeing the incorrect temp is a no no.

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1928 Model A CC Pickup

There was no plug on the top, there was just 2 wires going into the top on the sensor. I posted a pic of exactly what it was. Where you see the wire coming out of the top is where it used to have 2 wires. I will see if i can get a better picture.

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- Jase -
1971 Datsun 1600 P510 - Very slow project

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- Jase -
1971 Datsun 1600 P510 - Very slow project

Thank you guys for your replies so far. It is greatly appreciated.

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- Jase -
1971 Datsun 1600 P510 - Very slow project

Bummer. That means it was damaged sometime ago. It does look like a GM/Delco sensor. Go down to your local wreckers and look at a Holden Camera or other GM stuff even Daewo used GM sensors. Install it and compare the temp to that of your mechanical gauge you have installed or buy a cheap thermometer and compare the ECU reading and the thermometer reading. Cut off the connector from the donor the loom too.

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1928 Model A CC Pickup

Thanks guys for your replies so far.

I got a reply from EMS this morning.

Hi Jason,

You are in luck! The temp sensor you need is an imperial Dualsport Temp Sensor which we have in stock at the moment.

As the Dualsport is the ‘dinosaur’ of our ECU range (very old now) and as much of the componentry that was used in its manufacture and in the manufacture of parts to compliment it (eg. Wiring harness, communication cable etc) are no longer available to us now (obsolete), we are very limited on what we can still supply or repair from that ECU range, hence we do not advertise it as we cannot support it 100%.

The imperial thread Dualsport Sensor you need is $40.00 (incl GST). Just come down to our office/factory between 9am – 5pm weekdays (bring your old one if you want), but Peter the technician saw the image you sent through and knew straight away that it was an imperial thread Dualsport temp sensor!

Kind Regards
Margaret
EMS Computers Pty Ltd
Unit 9/ 171 Power Street
Glendenning NSW 2761

I will head down to their office this week to pick it up.
I will let you guys know how it goes.

Edit - I dont know why but I put italics around the email but it doesnt show up when posted.

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- Jase -
1971 Datsun 1600 P510 - Very slow project

Sweet!

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1928 Model A CC Pickup

No, italics don't work for some reason
When people say to me "we only have got one left", I usually reply, "that's good cause I only want ONE!".

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Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

Thanks for your replies guys.

I left work early today to go over the EMS and see about the temp sensor.

I met Peter who Margerate mentioned in the email.. Well you wouldnt beleive it that he lives about 2 minute drive from my house. He said if he knew he could of just brought it to my house.

And then another thing you wouldnt beleive.. He owns 2 Datsun 180b's (I think one was a SSS) one with a z18 and another with a VG30 how bizarre.

Anyways here is the part. I will fit it tomorrow night and let you know how it goes.





Thanks again for your replies

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- Jase -
1971 Datsun 1600 P510 - Very slow project

Looks a bit better than the old one!

_________________
Regards, Graeme
Just trying to help...
http://nissanman.shutterfly.com/
graemes@internode.on.net

I got the new sensor in over the weekend and it now reads 15 degrese which is good. However I am still not getting a spark..





I tested the spark by taking a spark plug out of the engine and putting it into the end of the lead and placing it so it was touching the head, I turn the key and the engine turns but still no spark.

If the timing was out would it still spark?

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- Jase -
1971 Datsun 1600 P510 - Very slow project