Use jack stands to hold up the vehicle. As such it has 3 wires coming out of its connector. In a nutshell this is what happens when you turn the key and crank the engine:The most important thing to know, is that if the crank sensor goes bad, your 4.8L, 5.3L, 6.0L GM vehicle vehicle will ‘Crank but Not Start’. You can find this tutorial in Spanish here: Cómo Probar El Sensor De La Posición Del Cigüeñal (P0336, P0337, P0338, P0339) (at: autotecnico-online.com). The scan tool should read between 100 and 500 RPM. Could still be a bad sensor. In other words, your GM vehicle will crank over when you turn the key to the Start position but will not start. A reading of zero indicates that the crankshaft sensor has failed completely. New crank, cam, rods, pistons, etc...I am awaiting a tune because it stalls. This is a discussion on Do I need a crank sensor relearn? This article will help you to troubleshoot and diagnose a bad crankshaft position sensor on your 4.3L, 5.0L and 5.7L Vortec equipped GM Pick Up or SUV.Since the 3-wire crankshaft position (CKP) sensor can not be tested by a multimeter resistance test (Ohms), I've written this article to show you how to do it with just a multimeter in Volts DC mode. It's not possible to do a simple resistance test of the crank sensor. This also means that this type of crank sensor creates an On/Off DC voltage signal that can be easily measured with a multimeter, an oscilloscope, and even an LED Light. Crankshaft Position Sensor (P0335) ... have a bad sensor, or even pinched the wiring near the starter. This electrical sensor monitors and records how fast the engine crankshaft is spinning. within the Computer & Tuning forums, part of the LSx Technical Help Section category; I just COMPLETELY rebuilt my motor. In this article, I'll show you how to test it using a multimeter (in Volts DC mode).The crank sensor test in this article is an On Car Test. The sensor sends the rate to the engine computer, which then synchronizes the ignition timing and fuel injection accordingly. As such it has 3 wires coming out of its connector.This also means that this type of crank sensor creates an On/Off DC voltage signal that can be easily measured with a multimeter, an oscilloscope, and even an LED Light. I thought the crank position sensor is only for misfire detection? This year I've switched engines to a 2006 LS2 out of a GTO. I went to plug in the crankshaft sensor, but the connector on the harness doesn't match up to the sensor. DO NOT trust the jack. How To Test The Crank Sensor (GM 4.3L, 5.0L, 5.7L) In this article, I'll show you how to test the crank sensor with a multimeter.Each one of the three wires that connect to it have a specific job to do. If the voltmeter is equipped with needle probes, the wires at the sensor connector need to be back probed. If you can't find anything, test the sensor using an ohm meter and turn the engine over. Think safety all of the time and take all necessary safety precautions (including using safety glasses).The one symptom that's gonna' be staring you right in the face is your GM pick up or van or SUV cranking but not starting.More specifically, you'll see one or all of the following symptoms when the crank sensor fails:The thing to remember about having a failed crank sensor, is that if you have spark or fuel injector pulses, the crank sensor is OK and not the cause of your No Start Condition.Check out the following links and comparison shop the original AC Delco (Delphi) crankshaft position sensor on your GM van (pick up or SUV):Not sure if the above crankshaft position sensor fits your particular GM vehicle? Crank Sensor Test -No Spark No Start Tests (GM 4.8L, 5.3L, 6.0L) Do I need a crank sensor relearn? Below is a simple list of more specific symptoms that accompany a bad crank sensor:The most important thing to remember, is that if you get spark from any spark plug wire, the crank sensor is working and the test in this article won't help you. Once that is done, you can compare the readings with manufacturer specifications. Step 2 - Wiring the Voltmeter. Why? Well, it's because this crank sensor is a Hall Effect type and these can not be ohmed (to find out if they're good or not).You'll need to lift the vehicle to gain access to the crank pulley. If the crank sensor fails, in your 4.8L, 5.3L or 6.0L GM vehicle, it's not gonna' start. If you guessed the crankshaft position sensor, then you would be correct. The GTOs kept a 24X crank, so I thought I was good to go (with the addition of a cam sensor extension). This is a very accurate and effective test and will help you to know if it's good or bad.Since this crankshaft position sensor test article covers quite a few GM years, makes and models, take a look at the ‘Applies To:’ box on the right and scroll with the ‘Next > >’ button to see all of the applications. SUGGESTION 1: The crank sensor test I'm gonna' show you in this article, is one of the most accurate ways to test the crank sensor without an oscilloscope (and using only a multimeter) only if you turn … A bad reading indicates that the crankshaft sensor isn't working right. If it doesn't, they'll find you the right one.The crankshaft position sensor, on your 4.8L, 5.3L, 6.0L GM vehicle, is a Hall-Effect three wire crankshaft position sensor. LS1/LS2 Engine Tech. I've got an LS1 harness 558-102 that worked perfectly with my '03 LQ4 6.0L. Anyways. To test if it your crankshaft position sensor is working properly, you have to test the voltage output. Important Suggestions. It runs just fine without it, you can unplug the it and the engine doesn't miss a beat, just turns on the SES. Don't worry, once you click on the links and arrive on the site, they'll make sure it fits! Set up the scanner to read engine RPM and crank the engine. The crankshaft position sensor, on your 4.8L, 5.3L, 6.0L GM vehicle, is a Hall-Effect three wire crankshaft position sensor. Your vehicle is equipped with a crankshaft position sensor. Double check eveything. Also, the info in this article is geared towards diagnosing and troubleshooting a You don't need any expensive tools to test the crank sensor on your 4.3L, 5.0L, 5.7L engine.The most common symptom of a bad crank sensor is a ‘cranks but does not start’ problem. If this is the case, in your particular case, the following tutorial may be of help:The following links will help you comparison for a new crankshaft position sensor:

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