Kinsler_Handbook_#32 December 2017

Kinsler Fuel Injection, Inc, 1834 THUNDERBIRD TROY, MICHIGAN 48084 U.S.A. www.Kinsler.com Phone (248) 362-1145 Fax (248) 362-1032 145 SENSORS FOR EFI SYSTEMS AIR TEMPERATURE SENSOR An air temperature sensor is a thermistor which monitors air temperature via a change in resis- tance. This sensor should be mounted where the incoming air will pass across the sensor tip. This sensor, when installed in the intake manifold, may be referred to as a M.A.T. (Manifold Air Temperature) sensor. All sensors are not created equal! There are different types, styles, and quality. Similar models may have different resistance values or response times. Most ECU’s must use specific sensors. A few select ECUs offer the ability to be programmed for operation with various sensors. COOLANT AND OIL TEMPERATURE SENSOR A coolant or oil temperature sensor is a thermistor which monitors coolant or oil temperature via a change in resistance. This sensor should be installed in the cooling system where the coolant will pass across the sensor tip. Thermostat housing areas on water cooled engines usually provides a good location. Be sure to install the sensor on the engine side of the thermostat, so it will sense the temperature as the engine is warming up... since the ECU needs accurate readings to properly meter the fuel during warm up. IDLE AIR CONTROL (I.A.C.) MOTOR A computer controlled motor, of either step or screw design. The idle air motor bypasses air around the throttles to control engine idle RPM during warm-up or when the engine is under a load near idle, as when in gear with a torque converter. When the ECU senses that engine RPM is too low, the I.A.C. motor opens the bypass port allowing additional air flow to the engine. #10652 #10650 #10653 #10651 KNOCK SENSOR Works like an electronic microphone, listening for sound (vibration) that represents spark knock or pre-ignition. The sensor produces an AC signal that increases with the intensity of detected knock. This al- lows the ECU to retard timing This sensor is NOT used on most racing and high performance engines because the engines generally produce too much mechanical noise knock sensor control circuits can be ad- justed to ignore the engines mechanical sounds, however this reduces it’s ability to accurately detect knock #10664 with #10660 © 2017 10652 Air temperature sensor, GM style, 3/8" NPT, specially potted by Kinsler, .585" probe length, compatible with Accel/DFI, F.A.S.T./Speed-Pro, Haltech, Motec, and EFI Technology electronic systems 10653 Air temperature sensor, Lucas, 10mm x 1.25 with crush washer, specially potted by Kinsler, .400" probe length, compatible with Zytek, Motec, and EFI Technology electronic systems 10650 Coolant temperature sensor, Bosch, 12mm x 1.5 with crush washer, .600" probe length, compatible with Zytek, Motec, and EFI Technology electronic systems 10651 Coolant or oil temperature sensor, GM style, 3/8" NPT, .500" probe length, compatible with Accel/DFI, F.A.S.T./Speed-Pro, Haltech, Motec, and EFI Technology electronic systems 10640 Coolant temperature sensor, GM style, 1/2-20 thread, .600" probe length, compatible with Accel/DFI, also used for Manifold Surface Temperature sensing with #10641 mount 10641 Housing, for Manifold Surface Temperature sensor #10640, blue anodized billet aluminum Special potting consists of injecting a silicone specially designed for electronic applications around the wire leads of the thermistor for protection against vibration #10641 with #10640 sensor installed 10660 Idle Air Control (I.A.C.) Motor, GM style, 20mm x 1.5 thread, step design, uses square four pin connector #10407 10662 Remote I.A.C. housing, high flow design, 3/8" NPT inlet, accepts air filter #10663 10663 Air filter for #10662 remote I.A.C. high flow houisng, K&N 5198 Pre-filter for protection of #10663 filter, blue 10664 Sealed remote I.A.C. housing, (2) 8 AN female inlet ports and (1) 8 AN female outlet port, 1 1/2" hex size housing with (2) 1/4-20 threaded mounting holes, this remote I.A.C. housing was specially designed for use on engines equipped with centrifugal blowers or turbochargers where the controlled air passage must be sealed in the air stream at the throttle inlet to prevent boost leakage #10660 #10662 #10663 #5198

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