Why does my GM 3.8L have no spark?

Here are the most common causes of a no-spark result: CASE 1: Spark was present in all of the cylinders This result tells you three very important things: 1.) the crank sensor is good, 2.) the ignition control module is OK, and 3.) the ignition coil coil packs are good. You don’t have to spend any time testing them or any money replacing them.

How to troubleshoot a GM 3.8L no start?

It’s been my experience that the majority of the Cranks but Does no start conditions I’ve troubleshooted and repaired (on GM 3.8L equipped vehicles) had their root cause in the ignition system. So, my recommendation to you is to check for spark at all of the spark plug wires with a spark tester.

How to test ignition system on GM 3.8L?

Testing the ignition system on your GM 3.8L equipped vehicle isn’t hard or difficult. I’ve written a tutorial that’ll show you in a step-by-step manner and you can find it here: GM 3.8L Ignition Control Module and Crank (3X, 18X) Sensor Test (at: easyautodiagnostics.com ).

Why is the ignition control module not working?

Go to: TEST 2: Testing The Ground Circuit. CASE 2: Your multimeter DID NOT register 10 to 12 Volts. This test result lets you know that the ignition control module is not getting power. You must find out why you’re missing this voltage. Without this voltage the ignition control module (ICM) will not function.

What is the crank sensor on a GM 3.1L engine?

This article will help you test the ignition control module (ICM) and 3X crankshaft position sensor on all of the GM 3.1L and 3.4L overhead valve engines (the 3X crank sensor is also known as the 7X Crank Sensor).

What does it mean when there is no injector pulse?

In case of that, there is no injector pulse or spark, this means that is your ECU has failed in operating in this case you have to get your ECU changed or visit an expert. You May Like: Low Fuel Light Comes on When Tank Is Full Causes and How to solve it Question: What controls the fuel injector pulse?

Why does my 3.8L GM crank sensor not start?

How To Test The 3.8L GM Crank Sensor With a Multimeter. lack of fuel reaching the injectors is the other major and common cause of a no start condition. The most common cause of this lack of fuel is an inoperative fuel pump.

What does it mean when there is no spark in all cylinders?

CASE 2: Spark was NOT present in all of the cylinders This usually tells you that the ignition control module (ICM) or the crank sensor is bad. It’s usually one or the other, I have never seen both go out at the same time. Now, with no spark in any of the engine cylinders, this what I would suggest:

What kind of coil pack does a Chrysler 3.3L use?

This is a complete diagnostic test of the ignition coil pack that’s used on the 1990-1998 3.3L, 3.8L V6 engines on Chrysler cars and mini-vans.

Why does my GM 3.8L engine not start?

If no voltage is present, as your helper cranks the engine, then the cause of no fuel condition is due to either a bad fuse, fuel pump relay. The engine in your vehicle could be bad and the source of the ‘cranks but does not start condition’. The way to find out if the engine is the cause of the no start is to do a compression test.

Is there a spark in a GM 3.8L engine?

Now, with no spark in any of the engine cylinders, this what I would suggest: GM 3.8L Ignition Control Module and Crank (3X, 18X) Sensor Test (at: easyautodiagnostics.com ).

Why does my Chrysler minivan have no crank?

If you still don’t have power coming out of those wires from the PCM, you have a bad PCM. If you now have power, you’ve got a short in the wiring harness to those sensors. A short will cause the PCM to appear dead. Shorts in the CMP and crankshaft position sensor are COMMON.

Why does my 94 Explorer have no spark?

My 94 explorer cranks but won’t start. I have no spark and no fuel. I have replaced the ignition module with a used one as they are $100 up,and replaced the crank positioning sensor (new). I tried oreilly & napa to test the ign. module but they say they don’t have the adapter for that year.

How to troubleshoot a no spark car engine?

I am grateful for the help. First, check for 6 volts between the negative terminal of the coil and ground while the engine is cranking. If you get 12 volts, the points are not conducting when closed, if you get 0 volts, you are not getting any voltage to the coil or the points are not opening.

What kind of engine was a 1964 Buick?

Aluminum parts still retained on 1964 Buick 300 inch engine, using much of the tooling for the 1961 Buick aluminum engine.

Why does my 1969 Chevy have no spark?

I don’t need to solve this, just curious…. I have a 1969 Chevy with a six cylinder engine that hasn’t run in many years. It has no spark though it cranks just fine. Do coils and condensers and plug wires deteriorate over time when not used, or is this more likely just bad connections here and there?

How to know if your engine has no spark?

First Confirm Your Engine Has No Spark. 1 Disable the fuel system by removing the fuel pump fuse or relay. 2 Insert a spark plug tester into the plug boot and ground it on a piece of metal on the engine. 3 Finally, Have someone crank the engine and watch for spark.

Is the ECM on my Buick LeSabre working?

Buick LeSabre: Customer Replaced ECM Now A No Start, No Lights, NO NOTHIN! – YouTube If playback doesn’t begin shortly, try restarting your device.

Where is the spark plug on a Buick?

If there is no spark, check the ignition control module located under the coil packs on the passenger side front of the engine. Probe the electrical plug with 14 wires in the ignition control module.

What causes a Buick engine to not start?

Check the intake manifold for vacuum leaks, given that the ignition and fuel system were both good. Look for any rubber hoses that are either disconnected or broken. A vacuum leak will cause a no start if the leak is large enough. Don Bowman has been writing for various websites and several online magazines since 2008.

Why does my GM 3.8L have no spark?