What is this?

[AWeb80]

It's on the back of a 3100 motor, on the head on the drivers side

 

[19Cutlass94]

thats the temp sender for your cluster.

[AWeb80]

ah

[5speedz34]

Yup same sensor on any 60* pretty much.

[19Cutlass94]

if I were you, Id plug it and convert to the 3-wire sensor.

[AWeb80]

if I were you, Id plug it and convert to the 3-wire sensor.

 

?

 

info on that?

[5speedz34]

I'm assuming for a gauge pod?

[19Cutlass94]

no. 3 wire sensor so the gauge and the ECM are reading from the same point. Its much more accurate.

[5speedz34]

no. 3 wire sensor so the gauge and the ECM are reading from the same point. Its much more accurate.

 

Doesn't the ECM read from the other one in the LIM?

[19Cutlass94]

Yupp. The ECM reads from the sender by the thermostat.

[dodgethis]

So for those of us who have a 3100. There is two temp senders that keep an eye on the temp of the block. One is used for the guage in the cluster to tell us if its overheating or whatever and the other is just for the ecm that we cannot see. If i have that correctly understood, thats kinda stupid if you ask me.

[Crazy K]

Actually, as a matter of fact... the one of the rear head is much more sensitive. the one on the intake will fail to warn you if an airpocket develops, you will not see true temperature until too late.

 

3 wire = more constant stable reading, but lower quality info

1 wire in rear head = better faster data

[19Cutlass94]

However the sensor in the rear hea will read much hotter than that by the thermostat.

[Crazy K]

However the sensor in the rear hea will read much hotter than that by the thermostat.

yes, and no.

 

yes when something is wrong

 

no when everything is running fine.

 

 

I'd like to know when things go wrong personally.

[Venom]

So for those of us who have a 3100. There is two temp senders that keep an eye on the temp of the block. One is used for the guage in the cluster to tell us if its overheating or whatever and the other is just for the ecm that we cannot see. If i have that correctly understood, thats kinda stupid if you ask me.

 

IIRC that only applies to the 95 and older 3x00s as the 96 and newer are OBD2 and have the 3 wire sensor already.

[Crazy K]

IIRC that only applies to the 95 and older 3x00s as the 96 and newer are OBD2 and have the 3 wire sensor already.

x2.

 

FYI in the 95 sedan, I have both a 3 wire sensor and the regular 1 wire in the head sensor, with the ability to toggle between them at will with a switch under the hood (i want to move it inside, though) there is no real difference to note, except the sensor in the head is more responsive and moves faster when the temp suddenly changes. GM changed to the 3 wire because it produced a more stable reading that was like likely to make people panic.

 

 

how can they read differently?

On psychomatt's CS he has the DIS and the digital UB3 gauge, and when he was having trouble, the ub3 showed the car to be one bar in the red, but the DIS showed the car to be 80 degrees F.

 

the problem turned out to be a hole in a coolant hose that allowed air to enter and the air would bottle behind the T-stat and cause the ECM sensor (which is what the DIS sees) to get a false reading of the air pocket (or the residual temperature of the intake) rather than actual engine temperature.

 

3 wire < 1 wire.

[RobertISaar]

IIRC that only applies to the 95 and older 3x00s as the 96 and newer are OBD2 and have the 3 wire sensor already.

x2.

 

FYI in the 95 sedan, I have both a 3 wire sensor and the regular 1 wire in the head sensor, with the ability to toggle between them at will with a switch under the hood (i want to move it inside, though) there is no real difference to note, except the sensor in the head is more responsive and moves faster when the temp suddenly changes. GM changed to the 3 wire because it produced a more stable reading that was like likely to make people panic.

 

 

how can they read differently?

On psychomatt's CS he has the DIS and the digital UB3 gauge, and when he was having trouble, the ub3 showed the car to be one bar in the red, but the DIS showed the car to be 80 degrees F.

 

the problem turned out to be a hole in a coolant hose that allowed air to enter and the air would bottle behind the T-stat and cause the ECM sensor (which is what the DIS sees) to get a false reading of the air pocket (or the residual temperature of the intake) rather than actual engine temperature.

 

3 wire < 1 wire.

 

 

I R Retarded.......

 

DIS?

i figured that ub3 means sport cluster, yes?

DIC means the digital cluster found in cutlass supremes?

[Crazy K]

DIS?

i figured that ub3 means sport cluster, yes?

DIC means the digital cluster found in cutlass supremes?

 

 

DIC = "Digital Info Center", basically is what it is called in most cars

DIS is basically the equivalent of DIC it is physically labeled as a Digital Information System in Cutlass Supremes, therefore = DIS

 

the "analog style" digital cluster in Cutlass Supreme is option coded as UB3, therfore when someone says cutlass UB3 they usually mean "Cutlass Supreme DIGITAL UB3" I try to say "digital UB3" for clarity.

 

now you know. (i hope)