Car temp sensor dropping to 0 under boost
14 November 2018, 01:18 PM
#1
Scooby Regular
Thread Starter
Car temp sensor dropping to 0 under boost
Hi Guys
I have a gc8 sti v3. The temp sensor gauge in car seems to drop near zero at times under boost/at speed. When I let off boost the temp seems to head to the middle again.The temp gauge drops at a controlled speed - it does not do it erratically like an electrical issue would.
I do have a new thermostat which opens a little earlier, but the car was doing this even before that was replaced.
Could it be a temp sensor issue?
Just trying to logically understand why it happens, if it is common and how I fix it
I have a gc8 sti v3. The temp sensor gauge in car seems to drop near zero at times under boost/at speed. When I let off boost the temp seems to head to the middle again.The temp gauge drops at a controlled speed - it does not do it erratically like an electrical issue would.
I do have a new thermostat which opens a little earlier, but the car was doing this even before that was replaced.
Could it be a temp sensor issue?
Just trying to logically understand why it happens, if it is common and how I fix it
14 November 2018, 04:52 PM
#5
Scooby Regular
I take it the car is running ok , no hg issues , i’m thinking possible old battery is every thing else electrical suffering ? poor earth ? poor alternator ? try a voltage tester , 12v or so when off , cranking around 9.6 plus under load, and 14 or so when charging
14 November 2018, 08:17 PM
#6
Scooby Regular
Thread Starter
Thanks for garage info - always good to know I have a garage near by which is trusted and has worked on Subaru’s!
Car runs great - can I ask why you suggested possible head gasket? Doesn’t not do it while revving at idle only revs at speed
Car runs great - can I ask why you suggested possible head gasket? Doesn’t not do it while revving at idle only revs at speed
14 November 2018, 08:49 PM
#7
Scooby Regular
I remember when my hg went coolant temp was all over the shop , i assume when air was where coolant should have been so it had no coolant to test the temp of so gauge showed cold , i’m sure if car is running fine then it’s ok , i’m still thinking battery charging related issue
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14 November 2018, 09:02 PM
#8
Scooby Regular
Thread Starter
Cheers mate! Funny enough I am thinking of putting in a very light weight battery. Car is a weeeknd car on a trickle charger. Anyone got any battery suggestions?
19 November 2018, 11:20 AM
#9
Scooby Regular
Any updates on your fault ? i would just do a standard battery even more so if it’s trickle charged , i have two cars garaged on trickle charge and have just left batteries as they are , the trickle charger is on for 2 to 3 hours a day as it’s on a timer
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