Question about 1990 Chevrolet C1500
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Posted on Jan 02, 2017
ever since 1995 you have to turn off useing a obd2 scanner, if you do not have one, you can go to any auto parts store and they will erase the code for free. by having the light still on the computer thinks it still has an error. good luck Toolman,
Posted on Jan 26, 2010
it is on the left side cylinder head...about mid way...between number 2 and number 4 Ignition coils...but lower...below but not under valve cover.
Posted on Sep 21, 2010
SOURCE: "1991 Chevy Cheyenne 4X4 K1500
The Engine Coolant Temperature (ECT) sensor is mounted in the intake
manifold and sends engine temperature information to the ECM. The ECM
supplies 5 volts to the coolant temperature sensor circuit. The sensor
is a thermistor which changes internal resistance as temperature
changes. When the sensor is cold (internal resistance high), the ECM
monitors a high signal voltage which it interprets as a cold engine. As
the sensor warms (internal resistance low), the ECM monitors a low
signal voltage which it interprets as warm engine.
Fig. 3: The ECT sensor is usually located near the thermostat housing Fig. : Engine Coolant Temperature (ECT) sensor wiring diagram Fig. : Engine Coolant Temperature (ECT) sensor temperature vs. resistance values
Fig. 1: Engine Coolant Temperature (ECT) sensor location-4.3L, 5.0L and 5.7L engines
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Fig. 3: The ECT sensor is usually located near the thermostat housing
Fig. : Engine Coolant Temperature (ECT) sensor wiring diagram
Fig. : Engine Coolant Temperature (ECT) sensor temperature vs. resistance values
Posted on May 28, 2011
SOURCE: my 1990 chevy cheyenne pickup
Have you sprayed just a "touch" of starting fluid in the air ram, that takes the air to the throttle body. If you do that & it fires, you have a fuel delivery problem. If that fails, do you have spark?? That can easily be checked, by placing the "inductive arm"over any plug wire, attach to the battery & crank. DON'T worry about timeing, YET. If when the engine cranks, trigger pulled on the timing light & hthe light "flickers", your getting spark. The only thing left then, would be that you could have thrown a timing chain. Removing the oil fill cap, see if using a narrow light, if you can see a rocker arm/ Then have an assistant crank the motor, & see if they move. If that is in accessable, remove a valve cover, lay a towel, cloth over the top of the rockers that contact the push rods, (unless you like an oil bath,,,ha,ha) . But, seriously, then have an assistant crank the motor, NO MOTION= Thrown timing chain.
Posted on Sep 14, 2011
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