How to test the crank sensor on a GM 4.3L engine?

Place your multimeter in Volts DC mode. Manually turn the engine by hand using a 1/2 inch ratchet and a socket on the crankshaft pulley (turn it clock-wise). Your multimeter will register an ON/OFF voltage signal as you turn the crankshaft pulley.

Where is the crank sensor on a car?

The crankshaft position sensor is located on the bottom (passenger-side) of the engine timing chain cover. The very first thing you’ll need to do is to verify if the crank sensor is producing a crank signal.

How to set Vortec 5.7 check engine light?

YOU MUST USE A SCAN TOOL TO SET TIMING ON VORTEC 5.7 Here at our repair shop we have the factory GM tech2 scan tool. You will be able to read the timing degrees with that. If the timing is off by more than 2 Degrees it will set a check engine light.

What happens if the crank sensor goes bad?

The most important thing to know about the crank sensor is that if it goes bad, your GM Pick Up or SUV will ‘crank but not start’ due to a lack of spark and fuel injection.

What do you need to know about Crank and cam sensors?

You’ve covered a lot of information so far, in this section I’ll get into the basic flow of tests that are part of diagnosing the crankshaft position sensor (and camshaft position sensor). Testing the crankshaft position sensors or camshaft position sensors requires that you test them in action, that is with the engine cranking.

How to center a Chevy 5.7 cam crank?

If you had the part and the engine was bare and you had to install without having clocked it, you center it. a degree in either direction or even up to six still has the basic area for the location. then rather than turning left or right, you center it. the plug wires line up and fit relaxed when you have it right.

Is there a relearn section for cam crank?

But Cam Crank Relearn is not in this section. Does anyone know in what section it would be? relearn for a computer can be as simple as disconnecting the battery and waiting, then reconnecting. during a restart, it can seek to relearn as they always have .I am not reading a book but responding from experience.

What should I see when I crank the engine?

So, when you crank the engine, you should see anywhere between 9 to 12 Volts. If the CKP or CMP sensor is bad, you’ll get no reading. Since this type of sensor only has two wires and no power supply, testing them is not that hard: One of the two wires is the signal wire that sends the signal to the fuel injection computer of ignition module.

Unplugging this connector will disable the computer from injecting fuel into the engine. You don’t need any expensive tools to test the crank sensor on your 4.3L, 5.0L, 5.7L engine. Multimeter. You can use a digital multimeter or an analog multimeter although the digital one is the preferred one.

Are there any problems with the Chevy 4.3 Vortec engine?

The 4.3 Vortec engines made from 1996-2002 (L35 and LF6) have been reported to have engine knock problems. In a properly functioning engine, fuel burns in even pockets instead of all at once. The pockets burn in even timing, in sync with engine cycles. Engine knock occurs when the fuel burns unevenly and out of sync with the engine cycles.

How to troubleshoot a no start GM 4.3L pick up?

Testing a Cranks but Does Not Start condition on your GM 4.3L, 5.0L, 5.7L pick up, van or SUV is not that hard to do, if you have a solid diagnostic strategy. In this article I’ll show you the basics of testing such a problem.

What kind of test can I do on a GM car?

With the tests in this article, you’ll be able to test and diagnose: A bad ignition control module, or a bad ignition coil, or a bad distributor cap, or bad spark plug wires. For a complete list of GM vehicles these tests apply to, take a look at the bottom of the page.

How do you test the starter motor on a GM 4.3L?

Disconnect the wire that attaches to the S terminal of the starter motor solenoid. Connect one end of the remote start switch to the S terminal on the starter motor solenoid and connect the other end to the battery positive post. Once you have everything set up, reconnect the battery negative cable terminal to the battery negative post.

Which is the best diagnostic code for a Chevy check engine?

1 Refer to our Generic OBD II code list for definitions on all other Chevy diagnostic trouble codes. 2 Manufacturer Specific Codes 3 P0342 4 P1031 5 P1032 6 P1105 7 P1106 8 P1107 9 P1108 10 P1109 11 P1111 12 P1112 13 P1113 14 P1114 15 P1115 16 P1116 17 P1117 18 P1118 19 P1119 20 P1120

What is the trouble code on a Chevy Express?

Something is causing cylinders to misfire at random, which is a lot less cut and dry than a cylinder specific misfire code. The P0300 Chevy trouble code will trigger the Express’s service engine soon light. The vehicle itself may begin to run rough.

What are the symptoms of a bad crank sensor?

The most common symptom of a bad crank sensor is a ‘cranks but does not start’ problem. In other words, your GM vehicle will crank over when you turn the key to the Start position but will not start. Below is a simple list of more specific symptoms that accompany a bad crank sensor:

What is the code for Crank no start?

Come along with Eric O. at the SMA shop as he has a look at this 2009 Chevrolet 1500 5.3 that was towed in as a crank no start. It has a code stored in it U0109 for “loss of communication with fuel pump control module.” You can follow along with Eric O. as he brings you along and diagnosis the FPCM.

How to diagnose the p0315 Chevrolet crankshaft system variation?

Accelerate to 55 mph and cruise for 2 minutes. 7. Stop the vehicle and idle for 2 minutes with the brake applied and the transmission in Drive (automatic trans.) or Neutral (manual trans.) with the clutch depressed. The cost of diagnosing the P0315 CHEVROLET code is 1.0 hour of labor.

How to test the crank sensor without an oscilloscope?

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 the engine by hand. You’ll need to use a 1/2 ratchet wrench and the appropriate socket to turn the crankshaft pulley.

How do you test the crankshaft position sensor?

You’ll need to use a 1/2 ratchet wrench and the appropriate socket to turn the crankshaft pulley. SUGGESTION 2: It’s very important that the Spider’s fuel injector’s connector be disconnected while performing the crankshaft position sensor test.

How to test the GM ignition control module?

You can find this tutorial in Spanish here: Cómo Probar El Módulo de Encendido GM 4.3L, 5.0L, 5.7L (1995-2005) (at: autotecnico-online.com ). Generally, when the ICM or the ignition coil fails, your GM car or truck will Crank but NOT START.

How to check no fuel condition on GM 4.3L?

I’ve also included how to check a no fuel condition with starting fluid (although this is not the most effective way to test the fuel pump). It’s been my experience that misdiagnosing a bad fuel pump is a common occurrence on the 4.3L, 5.0L, 5.7L GM vehicles with the ‘Spider’ fuel injector assembly.

What should fuel pressure be on GM 4.3L Vortec?

You can find this tutorial in Spanish here: Cómo Probar La Bomba de Combustible (GM 4.3L, 5.0L, 5.7L) (at: autotecnico-online.com ). The fuel system in your 4.3L, 5.0L, or 5.7L Vortec engine needs at least 50 PSI of fuel pressure to start.

How to test the GM MAF sensor ( 3.1L )?

With the red multimeter test lead and an appropriate tool, probe the MAF sensor connector’s C circuit as shown in the photo. With the black multimeter test lead probe the battery negative (-) terminal. Turn Key On with the engine Off. You should see 12 Volts on the multimeter. Do you have 12 Volts?

What are the OBD codes on a GM vacuum sensor?

GM OBD1 Codes 13 O2 sensor or circuit 56 vacuum sensor Quad drvier B (3.8L) 58 Trans code-TTS temp high 59 Trans code-TTS temp low 61 O2 sensor signal faulty

Why do I have to relearn the crank on my GMC Truck?

The reason for the relearn is for the missfire detection to be accurate. It is something that has to be done when useing a pcm that was not in your truck previously and had the case learn done on it. Even from the factory, each vehicle has to get this done to the computer/ motor it works with.

Can a PCM detect a misfire down to the indivual cylinder?

This let’s the PCM detect misfires down to the indivual cylinder. First off it does not hurt to drive with the ses liht on PROVIDING that the only code is for a case relearn needed. Without the case relearn done the PCM will not be able to correctly diagnose a misfire if you get one.

How to test the crank sensor for CKP?

Let’s interpret the results of your Crank Sensor Signal Test: CASE 1: The multimeter registered the ON/OFF voltage as you turned the engine with the ratchet. This is the correct test result and it confirmes that the crank sensor is working properly and creating a CKP signal.

How to test the crank sensor on a GM 4.3L engine?