The GM 3800 crank sensor is a vital component in the engine of your car, and if it starts to fail, it can cause several serious problems. In this article, we'll take a look at some of its most common symptoms, as well as some ways to solve the problem.
Engine sensors problems highlights
- DIY repairs:possible
- Tools needed:scanner,basictools
- Commonreasons:sensor problems, electric supply issues, software glitches
- Time to repair:1 - 2.5 hours
- Price for parts:$50 - $250
- Can you drive?In most cases, yes
- Alternative solutions:bypassing, driving in limp mode, roadside assistance
What is GM 3800 Crank Sensor
A crank sensor, also known as a cam sensor, is an electronic sensor that is used to detect the rotation of the engine's crankshaft. The sensor is used to activate the ignition timing and fuel injection in most modern vehicles, and without it, the engine will not start.
The crank sensor is installed in the engine block, and it is used to trigger the fuel injection system, ignition timing, and ignition advance. This sensor works by rotating at the same speed as the crankshaft and sending an electrical signal to the engine control module (ECM).
What are the Symptoms of a Faulty GM Crank Sensor?
If the crank sensor fails, the engine will not start, as the ignition timing will not be triggered. Some of the most common GM 3800 crank sensor symptoms include:
- Engine cranks but does not start because the ignition timing is not triggered when the engine is cranked.
- Engine runs at low RPM because the ignition timing is not triggered, causing the engine to run at a low speed.
- The engine will not idle well if the ignition timing is not triggered when the engine is idling.
- Engine stalls when set at a constant speed because the ignition timing is not triggered and the engine lacks power.
How to Fix a Faulty GM Crank Sensor
If you suspect that the crank sensor is faulty, you should have it tested as soon as possible. The crank sensor is relatively easy to test, and you can do so either at home or at a repair shop. Here are some ways to test the crank sensor:
- Connect the GM crank sensor tester: Connect the GM crank sensor tester to the sensor's wiring and ground the tester. If the tester shows an incorrect voltage reading, the sensor should be replaced.
- Look for external damage: Look for external damage on the sensor, such as corrosion on the terminals. If you notice damage, the sensor should be replaced.
- Try the old sensor in the new engine: If the old sensor does not fit the engine, it's faulty and should be replaced.
Conclusion
The crank sensor is a sensor that is used to detect the rotation of the engine's crankshaft. Some of the most common GM 3800 crank sensor symptoms include engine cranking but not starting, engine running at low RPM, engine not idling well, and engine stalling when set at a constant speed.
If the crank sensor is faulty, it should be replaced. If you suspect that the crank sensor is faulty, you should have it tested as soon as possible. The crank sensor is relatively easy to test, and you can do so either at home or at a repair shop.
About the authors
The CarAraC research team is composed of seasoned auto mechanics and automotive industry professionals, including individuals with advanced degrees and certifications in their field. Our team members boast prestigious credentials, reflecting their extensive knowledge and skills. These qualifications include: IMI: Institute of the Motor Industry, ASE-Certified Master Automobile Technicians; Coventry University, Graduate of MA in Automotive Journalism; Politecnico di Torino, Italy, MS Automotive Engineering; Ss. Cyril and Methodius University in Skopje, Mechanical University in Skopje; TOC Automotive College; DHA Suffa University, Department of Mechanical Engineering
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