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What you are describing sounds like a bad crankshaft position sensor. When they start going bad, they are affected by heat. Take a look through these three links. The first describes what the sensor does. The second discusses symptoms and the third discusses in general how one is replaced. Now, when I suspect a bad sensor (which may or may not set the check engine light to come on) I use a live data scanner. If the sensor fails, you will lose the engine RPM signal to the scanner.
https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement
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You can also check the sensor for resistance. Here is how it's done. Additionally, here are a couple links to help you check the resistance:
https://www.2carpros.com/articles/how-to-use-a-voltmeter
https://www.2carpros.com/articles/how-to-check-wiring
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CKP SENSOR RESISTANCE
- Ignition OFF.
- Measure the resistance between:
Pic 1
Is the resistance between 0.25K - 1K ohms? If not, replace the sensor.
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If you find this is the problem, here are the directions specific to your vehicle for replacement.
REMOVAL AND REPLACEMENT
CRANKSHAFT POSITION (CKP) SENSOR
Pic 2
Removal and Installation
1. With the vehicle in NEUTRAL, position it on a hoist.
2. Remove the 5 bolts and the RH splash shield.
- To install, tighten to 9 Nm (80 lb-in).
pic 3
3. Disconnect the crankshaft position (CKP) sensor electrical connector.
4. Remove the bolt and the CKP.
- To install, tighten to 10 Nm (89 lb-in).
- Inspect the O-ring seal and install new as necessary.
5. NOTE: Lubricate the CKP O-ring seal with clean engine oil.
To install, reverse the removal procedure.
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I hope this is helpful. Let me know if you have additional questions or need help.
Take care,
Joe
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Wednesday, August 19th, 2020 AT 7:12 PM
(Merged)