Temp gauge spikes and car stalls?

[Snrub]

Coolant has a fairly distinct smell. When the engine begins to warm up and you pop the hood, do you smell anything? The coolant system is pressurized and a small leak may simply vaporize, but you may be able to smell it. Based on what you're describing, if you're running the car, I wouldn't let it get much warmer than when the electric fan turns on. That's usually around the point where the thermostat opens up to allow coolant to be circulated to the radiator and cooled. Air going through the radiator indirectly cools the coolant and when the car isn't moving, the fan provides all of the air circulation.

 

[dvs1.6]

Coolant has a fairly distinct smell. When the engine begins to warm up and you pop the hood, do you smell anything? The coolant system is pressurized and a small leak may simply vaporize, but you may be able to smell it. Based on what you're describing, if you're running the car, I wouldn't let it get much warmer than when the electric fan turns on. That's usually around the point where the thermostat opens up to allow coolant to be circulated to the radiator and cooled. Air going through the radiator indirectly cools the coolant and when the car isn't moving, the fan provides all of the air circulation.

no smell or signs of leaking coolant.

 

[MagnetiseST]

Bleed or flush the coolant, air gets trapped in the coolant system and causes air pockets. When one of those pockets gets to the sensor it skyrockets the temperature and throws the car into limp mode.

 

[dvs1.6]

Finally got around to working on the car. Found some oily red liquid around the coolant temperature sensor. Stuff was not motor oil or coolant, not sure what it could be. Color was like that of ATF. Removed the sensor cleaned out the area and the connector (which was covered in this stuff) really good and replaced the sensor with a new one. So far so good, hoping this takes care of the issue. Will check back if something goes bad again. Fingers crossed (x).

 

[TyphoonFiST]

The only fluid that is sordove Red in color is the coolant.The crust ill bet was white and Red/Pink.

 

[dvs1.6]

The only fluid that is sordove Red in color is the coolant.The crust ill bet was white and Red/Pink.

It wasn't coolant. It had the consistency of motor oil but was red. Who knows....

 

[TyphoonFiST]

Anaerobic gasket sealer?

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[AZSP33D]

Some coolant additives turn into a syrup under heat and oxidation, while the rest of it evaporates. Had a track bike that easily overheated, had the head gasket replaced thinking it would be the issue... serviced with Evans Coolant as I needed to remap the ECU on the dyno (changed to a larger exhaust also) and overheating is no issue with Evans as it boils at 375F... after it sat for a while, there was plenty of this sticky goo at the center of the radiator, strange, from some sort of a pinhole. No evidence of leaking before as the water based coolant just flashed off. I still haven’t replaced the radiator (still sitting on my dyno waiting for me to finish some other stuff), but I’m pretty sure that fixes it.

 

[Benfeld1]

New to the forum here and looking for some insight to a problem my 2014 St is having. When the car runs it runs great but all of a sudden it begins to bog down and the temp gauge shoots to the highest point. I will pull over shut off the car and wait about a minute or two and restart the car and it will usually go away. Sometimes i have to restart it a second time to get it to "reset" for lack of a better word. Details on the car are: 100% stock with 59k miles.

hoping someone can chime in....

Year old post so I'm hoping you're still around, did you find a resolution to this? Did cleaning the connection and sensor seem to help?

I've also got a 2014 ST with about 122,000 and it just started doing this as well. No issues with actual overheating, no puddles or anything. I've cleared the code and the coolant temp is always around 190-200 degrees immediately after. I'm suspecting either a bad sensor or a short, since it's completely random when it happens. I've turned the car on, pulled out of my driveway and made it maybe 1000 ft and had it go off.

 

[TyphoonFiST]

Year old post so I'm hoping you're still around, did you find a resolution to this? Did cleaning the connection and sensor seem to help?

I've also got a 2014 ST with about 122,000 and it just started doing this as well. No issues with actual overheating, no puddles or anything. I've cleared the code and the coolant temp is always around 190-200 degrees immediately after. I'm suspecting either a bad sensor or a short, since it's completely random when it happens. I've turned the car on, pulled out of my driveway and made it maybe 1000 ft and had it go off.

Does it qualify for the coolant system recall? Or has it been done already? If you don't know call ferd with the VIN and find out. Recalls are always FREE*

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[Benfeld1]

Called Ford, already had the coolant recall before I purchased it. Swapped out the CHT sensor last night, and still having the issue.

 

[TyphoonFiST]

Called Ford, already had the coolant recall before I purchased it. Swapped out the CHT sensor last night, and still having the issue.

Once a recall...Always a Re-call* If that has issues it should be covered under Warranty still.

 

[Poofies]

Called Ford, already had the coolant recall before I purchased it. Swapped out the CHT sensor last night, and still having the issue.

It feels like it would have to be that sensor or connection. Was the plug clean? Might try hitting contacts with steel wool.

 

[Benfeld1]

It feels like it would have to be that sensor or connection. Was the plug clean? Might try hitting contacts with steel wool.

Old sensor had a little residue in the bottom. I hit the plug with some electronics cleaner spray and some compressed air to dry it out. Installed the new plug, when I started back up I cleared the code, and took it for a drive and it pegged about 500-1000 ft from my driveway. I'm starting to wonder if there isn't some air in the coolant system that's causing it to throw the code. It's fairly consistent now that it pegs about 2-3 minutes after start, even if sitting in my driveway idling. No leaking fluid, and no signs of overheating other than the CEL and the temp gauge spiking. I'm about ready to have it vacuum purged and flushed.

Also, this afternoon I swapped out the new Autozone (Duralast - was all I could get a hold of afterhours last night) sensor for the old, cleaned up Ford sensor, as if I take it to the dealer I don't want them blaming it on the Autozone part.