Why is my Chevy k1500 not getting spark?

Chevrolet k1500 getting spark to all plugs, gas to TBI, continuity from ECM to injectors, but no pulse to injectors. Please help! Every possible part I could test passed just wondering if it is an ECM problem?

Is there a no pulse to injector problem?

No Pulse to Injectors: Chevrolet K1500 Getting Spark to All Plugs… Chevrolet k1500 getting spark to all plugs, gas to TBI, continuity from ECM to injectors, but no pulse to injectors. Please help! Every possible part I could test passed just wondering if it is an ECM problem?

How does the engine control unit control the injector pulse?

Question: What controls the fuel injector pulse? Ans: The engine control unit is the electronic brain that used to control the fuel injector pulse by gathering data from various sensors along the fuel line

What does GM code 12 no distributor pulses mean?

GM Code 12 No Distributor Pulses. Trouble Code 12 is a special case code that is not logged into the ECM’s Non-Volatile Memory (NVM) when detected. When the ignition is ON and the ECM detects no ignition reference pulses coming from the ignition module, it illuminates the Service Engine Soon lamp.

Where is the injector pulse on an ECM?

Okay ecm fires injectors with ground…should have a set of ground wires at thermostat..and one on intake behind where ac pump is or should be. Make sure clean and connected tight.

Where does the injector pulse come from in a truck?

I guess no one reads….injector pulse comes from ecm..via ignition module..pickup coil.Once ecm senses 400 rpm,s from engine it takes over. But injectors pulse works off of ground from ecm…you have to have the grounds at thermostat and intake or will not pulse injectors.Grounds for all sensors.

Is there an injector pulse while cranking the engine?

The engine will run if you either spray starting fluid down the throttle body or hook up a remote start switch. If you use the key, there is no injector pulse while cranking. As you let go of the key and return it to the run position, the injectors give one squirt.

What kind of signal does a GM injector pulse have?

Purple/white wire with key on had barely any signal at all. Wires to the injectors have 12v with key on. I have fuel at the rear of the tbi but not sure of the pressure?

Where is the spark in an ignition system?

Electronic ignition pickups are a component found on traditional electronic distributor ignition systems. They are located inside the distributor and function as the trigger for the ignition system to produce spark. The pickup coil monitors the rotation of the distributor and triggers the ignition system.

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.

How can I test for no spark on my injector?

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on. 2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

What kind of spark does 89 Chevy k1500 have?

I have a 89 Chevy k1500 5.7 TBI. Went to storage the other day and the truck shut off on me while driving. Pulled off the road and after a couple attempts it started back up. Got about 5-6 more miles and it shut off on me again and died. Has not started since. Tested spark at plugs and coil no spark.

What kind of Chevy truck has no spark?

I have a 93 K1500 TBI 350 and it has no spark at all. I’ve checked the module, checked the pickup coil, checked the coil itself and can’t figure it out.

Can a Chevy k1500 TBI 350 have no spark?

No, you have to disconnect it from the ICM inside the distributor. The test lead polarity does not matter since you are measuring resistance. First off I know this is an old post but it pertains to similar issues I’m having. I have a 93 K1500 TBI 350 and it has no spark at all.

Why is there no pulse from the injector?

Used all original electronics and tbi. New wires, plugs, cap, rotor, fuel filter,etc… have spark, have fuel at the back of the tbi. No pulse at all from either injector?

Okay ecm fires injectors with ground…should have a set of ground wires at thermostat..and one on intake behind where ac pump is or should be. Make sure clean and connected tight.

Is there a spark in my GM Truck?

Yes, that too would be an issue. However, you would get nothing when trying to start, let alone a spark issue. So I am having the same problem, and thought maybe I had a ground issue.

What was the ignition module on a 1993 GMC k1500?

1993 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a no-start problem caused by the ignition module, or the ignition coil, or the distributor pickup coil. Wiring diagram. Component pin outs.

Can a bad spark plug cause a bad ignition?

No spark coming from any of the spark plug wires. The throttle body fuel injectors do not spray gasoline. The following are usually the most common symptoms of a bad spark plug wires, or a bad distributor cap and rotor on this type of GM distributor mounted ignition control module:

Yes, that too would be an issue. However, you would get nothing when trying to start, let alone a spark issue. So I am having the same problem, and thought maybe I had a ground issue.

What to do if your truck has no spark?

What you have changed either the ignition module in side distributor or pickup coil on distributor. shaft. Can take ign. module to auto parts for a test . see if it is good. Check all your grounds and check the wire from the battery to your starter…ive seen them go bad and once i replaced them,worked like new!

How to troubleshoot a GM 4.3L no start?

Check that the 8 cylinders are getting spark with a spark tester. The distributor cap is good. The ignition coil is good. The ignition control module is good. The crankshaft position sensor is good. The distributor cap could be bad. The ignition coil to distributor cap high tension wire could be bad. The ignition coil could be bad.

Can a bad crank cap cause a no start?

The ignition control module could be bad. The crankshaft position sensor could be bad. Testing the distributor cap, the ignition coil to distributor cap high tension wire, the ignition coil, the ICM, and the crank sensor can by done by the do it yourself-er (DIY’er) and the following tutorials will help you test the ignition system:

Why is my Vortec 5.7 not sparking?

Went and stuck it back together it, new cap new rotor wires will crank, spark and fuel but can’t get it to start. Triple checked firing order, can see gas in the throttle body am stumped. Any ideas of what this problem could be?