Question about 1990 Chevrolet C1500

1 Answer

I have a 1990 chevy cheyenne. The engine will turn over and start but i have to continue to play with the gas to keep it running. I cannot keep it running for long because it will die. It has a 4.3 V6 in it and is 2wd. I have a code reader for it and it shows code 15 which is "coolant temperature sensor fault - signal voltage high" What do you think is the problem and where is the coolant sensor and where can I test it at?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Chevrolet Master
  • 3,425 Answers
Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 3640 Answers

SOURCE: no voltage at the engine coolant temperature

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

  • 1 Answer

SOURCE: engine coolant temperature sensor

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

  • 227 Answers

SOURCE: i have a 1990 chevy

starter jump from big termal to small one shood crank

Posted on Feb 04, 2011

ZJLimited
  • 17970 Answers

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.

zjlimited_1301.jpg

Fig. 1: Engine Coolant Temperature (ECT) sensor location-4.3L, 5.0L and 5.7L engines


TESTING

  1. Remove the ECT sensor from the vehicle.
  2. Immerse the tip of the sensor in container of water.
  3. Connect a digital ohmmeter to the two terminals of the sensor.
  4. Using a calibrated thermometer, compare the resistance of the sensor to the temperature of the water. Refer to the engine coolant sensor temperature vs. resistance illustration.
  5. Repeat the test at two other temperature points, heating or cooling the water as necessary.
  6. If the sensor does not met specification shown in the temperature versus resistance chart, it must be replaced.
  7. The sensor may also be checked in the vehicle. Unplug the sensor and attach a digital ohmmeter to the two terminals of the sensor.
  8. Using a calibrated thermometer, compare the resistance of the sensor to the ambient air temperature.
  9. Repeat the test at two other temperature points, heating or cooling the water as necessary.
  10. If the sensor does not met specification shown in the temperature versus resistance chart, it must be replaced.
zjlimited_1302.jpg

Fig. 3: The ECT sensor is usually located near the thermostat housing



zjlimited_1303.jpg


Fig. : Engine Coolant Temperature (ECT) sensor wiring diagram



zjlimited_1304.jpg


Fig. : Engine Coolant Temperature (ECT) sensor temperature vs. resistance values




Keep us updated.

Posted on May 28, 2011

  • 87 Answers

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Is SAE 5W - 30 ok for my old Jeep and Cheyenne...


Its probably ok but I would recommend 10w30 for anything with more than 100,000 miles on the odometer.
Also, 5w30 works better in colder temps, the first number is the "cold thickness" and the second number is the "hot thickness". The bigger the number the thicker the oil in basic terms.

Apr 04, 2016 | 1997 Jeep Grand Cherokee

1 Answer

Why would a 93 chevy Cheyenne just stop in tha middle of me driving it and thn wont start amymore the key turns over and acts like ita out of gas but.


Because something is defect. Or blocked.
Fuel line can be blocked or have an air bubble in it. But there are 1000 possible causes, why an engine does not run any more.

Mar 13, 2015 | Cars & Trucks

1 Answer

Chevy c1500 no spark


I agree, the ECM

Jan 08, 2014 | Cars & Trucks

2 Answers

1996 chevy cheyenne, c1500 starts but engine won't


When the key switch is off and the engine is not running, do you have power to the coil ? Could be a problem with the key switch.

Jul 01, 2013 | 1996 Chevrolet C1500

2 Answers

1988 chevy cheyenne will turn over. but won,t start. the spark plugs fire blue every one. the fuel injectors shoot gas all the way to the pistons . it did run fine and all of a sudden it quit. i have...


Inside or directly under the distribitor cap is a plastic ring with either one or two wires attached..... these devices fail and not allow the engine to start.
It happened on my 88 chevy (305 cu in.). a quick fix is to replace it with a new one.. (Advance Auto) or other parts store.

Jun 29, 2011 | 1988 Chevrolet C1500

1 Answer

I need to find the correct spark gap setting for a 1995 Chevrolet Cheyenne truck. It has a 1500 / 350 engine.


Make: CHEVROLET Cheyenne
Model: C1500 and K1500
Year: 1995
Engine: V8 - 5.7L - FI - - GAS

Part Number: RV15YC4 (Original Equipment Manufacturer and/or Original Equipment Equivalent)
GAP .035"

Hope helps (remember rated and comment this).

Aug 25, 2010 | 1990 Chevrolet Celebrity

1 Answer

Why wont my 96 chevy cheyenne 5.7 run unless i put


Probally needs fuel pump. Pump is in the tank. remove gas cap listen when you first turn on key it will run for a few seconds.

Sep 25, 2009 | 1996 Chevrolet Crew Cab

1 Answer

Battery wont hold charge


check the starter...........

Oct 15, 2008 | 1990 Chevrolet K1500

Not finding what you are looking for?
1990 Chevrolet C1500 Logo

Related Topics:

137 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76070 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8266 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...