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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » Coolant temp maxing out at 159.8 F

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Author Topic: Coolant temp maxing out at 159.8 F
FullySpooled
Member
Posts: 1
Post Coolant temp maxing out at 159.8 F
on: April 8, 2019 (GMT)

I swapped a Chevy 4.8 LS engine into a car and I am using Torque Pro on an Android tablet for my coolant temp gauge. The problem is the temperature is maxing out at 159.8 degrees F and will not go any higher. I plugged my laptop into the OBDII port and my datalogging software is showing a coolant temp of 200 degrees using the same sensor info, so it’s clearly Torque that is wrong. Has anyone come across this issue?

Thanks.

1992 Lexus SC400
4.8 LS and Magnum T56 swap

cintakc
Member
Posts: 1458
Post Re: Coolant temp maxing out at 159.8 F
on: April 9, 2019 (GMT)

I think the PID temperature you are using is not suitable for this engine.

F-150Torqued
Member
Posts: 427
Post Re: Coolant temp maxing out at 159.8 F
on: April 9, 2019 (GMT)

^^^^^^YES. I think @cintakc is absolutely correct.

The ECU has to calculate temperature from the output of the temperature sensor (probably based on some temp-resistance curve). Then OUTPUT it’s result on the OBDII ‘ECT’ pid. You swapped in an engine with a sensor likely having completely different electrical/resistance characteristics. SO: As we say here in South Texas – All bets are OFF. Try using the ECT sensor from the old engine.

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54371019

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