Here is what my car is doing;

- When I first turn it on, could be in the morning or after I've been driving it for a bit, the fan comes on (A/C is off)

- The coolant temp indication on my DIC still operates and indicates a normal cooling condition.

- When a friend of mine recently connected his HP Tuners, the car constantly indicated an overheat condition (I think around 120 degrees)

- The car dosn't appear to be overheating

- The I/C pump appears to be working because I can feel coolant flow through the lines of my OTTP heat exchanger.

Alldata DIY says its the (ECT) Engine Coolant Temp. Sensor, but my dad, who is a mechanic, thinks its the thermostat.

Anyone else ever have the same kind of problems?

Thanks in advance for any advice or help.

 

im confused. what is the actual problem? just what the HPT scan is saying? and you said an overheat condition, and then posted 120*...which is definitely not overheating

 

same thing im going through my car been at the shop for a week now so good luck

 

hey bro im having the same problem.. my fans stay on even when the key is on but the car isnt running.. i changed the ECT sensor and that didnt do a thing.. someone else had the same problem also and he told me that he replaced his thermostat and that fixed it.. sounds weird but i guess if the computer finds a problem with the thermo, it automatically kicks the fans on as a safety precaution..

 

Thanks man, I'll try replacing that first. I'll let you know how it goes.

 

did u ever get a chance to change out that thermo man??

 

coolant temp sens is bad..its happens alot to most gm vehicles..i doubt its the thermostate other wise u would have a high reading and the car wouldve overheated by now...but to be on the safe side dont be hard on it.

 

No I haven't, Waiting till next week.

And if the coolant temp sensor is bad you would think that the indication givin by the DIC would not be functioning. I dunno, I'll probably replace them both

 

I'm guessing you have a bad thermostat.

 

Ya same here

 

ya man like i said i changed the sensor and it didnt do a thing to stop the fans.. relays are good too..so im still gonna have to change out the thermo n see what happens.. it looks like such a pain to do.. im gonna wait till i can get ahold of a lift n do it on there

 

old thread but what was wrong in the end if you remember ?

 

The I/C pump turned out to be intermittent, the cars lease comes due in December so I'm not going to bother fixing it.