Thread: cooling sensor help!!!!!

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After a little research this is what i found in a chevy fuel inj. mod book:



CTS - or cooling temp sensor-- a resistor known as neg. temp coefficient thermistor. This type of resistor responds dramatically to temp.

At 40) degrees F - the resistance is 100,700 ohms

At 212) degrees F- the resistance is around 200 ohms

***** it also says the IDEAL TEMP IS 185 ohm at 212) degrees F*******

The CTS replaces the choke like on a carbed car

When the ECM sees high volts from the CTS sensor it increses the pulse with to the fuel injectors

When the engine is cold the wire carring the 5 volt reference will have 4 to 5 volt reference. As the engine warms up the volts will drop

A old Track Trick is installing a 640 ohm resistor across the terminals of the wiring/ with it disconnected to the sensor will trick the ecm to believe the temp is 145) degrees F and you may gain some power.

It will make the ECM respond by enriching the mixture /air-fuel plus advance the timing--
It also says the prolonged use may cause severe over heating because the ECM wont know to turn the fans on

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