How to troubleshoot ignition system on Chevy Blazer?

Remove the coil wire from the coil, and hold the 12-volt test light close to, but not touching, the secondary coil tower that the coil wire was plugged into. Turn the ignition to the “Start” position and watch the coil. A bright spark should jump from the coil tower to the test light.

What happens to the pickup coil when the ignition fails?

The pickup coil monitors the rotation of the distributor and triggers the ignition system at the optimal moment to produce the best timed spark for best engine performance. As the ignition pickup essentially functions as the activation switch for the entire ignition system, when it fails,…

Can a bad ignition coil cause a no start condition?

Car is not starting A faulty ignition coil can also lead to a no-start condition. For vehicles that use a single ignition coil as the source of spark for all of the cylinders, a faulty coil will affect the operation of the entire engine.

How does the ignition work on a S-10 Blazer?

Troubleshooting the ignition system in your S-10 Blazer begins with a basic understanding of how the system works. Electrical power is supplied to the primary coil of your ignition coil by the ignition module, generating a magnetic field around the secondary coil in the ignition coil.

Why is my ignition coil not working on my Blazer?

Touch the LED light’s positive lead to the battery’s positive terminal, then crank the engine again. If the light flashed on and off while you cranked the engine, then the ignition control module is bad.

What should the coil voltage be on a blazer?

Now, touch the red DMM lead to the battery’s positive terminal, and poke the black lead into the C-wire (black with white stripe); again, you should see between 10 to 12 volts. If you didn’t get these results, then your problem is the power supply, not the coil/module.

Why does my Chevy Blazer misfire at 2500 rpm?

A visual inspection showed that new spark plugs, spark plug wires, ignition cap, and rotor have been installed. Further information from the customer indicated that the truck misfired the worse in drive, not overdrive, at light to normal cruise around 2000 rpm to 2500 rpm. The next test drive indicated that he was right and it was very repeatable.

What to do if your blazer has no power?

If no power is present, replace the brown fusible link on the back of the Blazer’s starter. If power is shown on one wire and ground is shown on the other wire, replace the coil. Remove the electrical connector from the coil and back-probe the ground wire.

How to know if your car has a p0758 code?

Symptoms of a P0758 trouble code may include: 1 Transmission slipping 2 Transmission overheating 3 Transmission catches in gear 4 Decreased fuel economy 5 Possibly misfire-like symptoms 6 Vehicle enters limp mode 7 Check Engine Light illuminated

What does p0753 mean on a Chevrolet?

When the Powertrain Control Module (PCM) detects a continuous open, short to ground or short to power in the 1-2 SS valve circuit , then the P0753 is set. P0753 CHEVROLET Possible Symptoms. P0753 CHEVROLET Meaning. The 1-2 Shift Solenoid (SS) valve controls the fluid flow acting on the 1-2 and 3-4 shift valves.

Is there a code for cylinder 4.3 misfiring?

With the computer conected we monitored the live data and were recordeing most of the misfires in cylinder 6, 4, 2 with an occational misfire on 5. We had no codes recorded in the ECM but the fuel trims were way off.

What was the misfiring code on my 1999 Chevy S-10?

First we replaced the plugs that were the wrong ones. With the computer conected we monitored the live data and were recordeing most of the misfires in cylinder 6, 4, 2 with an occational misfire on 5. We had no codes recorded in the ECM but the fuel trims were way off.

What to do if ignition light is not flashing?

If no flashing ground signal is indicated, replace the ignition module and pick-up coil in the Chevy’s distributor. Remove the coil wire from the coil, and hold the 12-volt test light close to, but not touching, the secondary coil tower that the coil wire was plugged into.

What are the wires on a blazer ignition coil?

On the four-wire plug, from top to bottom: The A-wire (pink) is the 12-volt power wire, B-wire (white) is the ignition control signal, C-wire (black with white stripe) is the engine ground and D-wire (white with black stripe) is the switching signal circuit.

What should ignition voltage be on Blazer 4.3?

With the ignition key in the “on” position, place the black probe lead on the battery’s negative terminal, then poke the red lead into the A-wire (pink) — you should see between 10 to 12 volts.

Can a bad ignition coil cause a car to not start?

This article will take you step by step through the whole process of diagnosing and troubleshooting a bad ignition control module and ignition coil. The ignition control module (ICM) and ignition coil tests in this article assume that your vehicle is Cranking but NOT STARTING due to a NO SPARK Condition.

Which is spark tester do you need for ignition coil tower?

This is a pretty easy test, but it must be done with a spark tester. You can find the test steps here: TEST 4: Spark Test At Ignition Coil Tower (this test belong to this tutorial: How To Test A Misfire / No Spark-No Start Condition (4.3L, 5.0L, 5.7L 96-04) ).

Why is my Chevy Trailblazer key stuck in the ignition?

All vehicles equipped with automatic transmissions have a lock that keeps the key from being removed from the ignition while the vehicle is in gear. This prevents your Trailblazer from “rolling off”. When the vehicle is in any other gear than park will act like neutral and roll away without the parking brake on.

What are the symptoms of a bad ignition lock cylinder?

If the ignition lock cylinder wear out or breaks, it may prevent the vehicle from starting when the key is inserted and turned. 3. Issues inserting and removing the key. Issues with inserting and removing the key are another symptom of a potential problem with the ignition lock cylinder.

Can a bad ignition lock cause a car to not start?

If the ignition lock cylinder wear out or breaks, it may prevent the vehicle from starting when the key is inserted and turned. A no start condition can also be caused by a wide variety of other issues, so having the vehicle properly diagnosed is highly recommended.

What causes a Chevy Trailblazer to get stuck in the ignition?

If your Chevy Trailblazer’s battery doesn’t have enough voltage to properly engage the safety mechanisms that leave your key stuck in the ignition can cause the issue. Here are ways that you can get your Trailblazer’s key free.

Why is my Chevy Trailblazer key stuck in the lock?

This prevents your Trailblazer from “rolling off”. When the vehicle is in any other gear than park will act like neutral and roll away without the parking brake on. Leaving the key stuck in the lock is the manufacturers way of telling you that you need to put it in park before you leave the driver’s seat.

What to do if your key gets stuck in the ignition?

Take the good key and duplicate it. Rusted – A key that is rusted can get stuck in the ignition system easily. It doesn’t have to be a lot of rust. Just enough to keep it from moving freely. As with a bent key, just start over. Once something rusts, it comes back a lot easier.

Why did my 1998 Chevy S10 not catch fire?

Again my 1998 Chevy S10 No fire was caused by what is called an ignition igniter which sit on the side of my coil bracket next to the coil. I hope this will help someone with the same problem. 10 people found this helpful.

What happens when an ignition module overheats?

Ignition modules that are overheating will soon completely cease to function and in the meantime can cause cause electrical shorts, engine stuttering, lower gas mileage, power loss, stalling, and gasoline odors in the exhaust.

What to do if spark doesn’t work on S-10 Blazer?

If the spark is weak or doesn’t happen, replace the coil. Remove the plug wire from a spark plug, leaving it attached to the distributor cap (or coil pack on S-10s with distributor-less ignition systems) and turn the ignition key to the “Start” position. A bright spark should cross an inch or more to the engine block.

Is there no power to the dash or ignition?

The problem I’m having with it is I have no power to the dashboard or ignition (turn key and nothing happens…no dash lights and no starter kick).

Why is my ignition module not working properly?

It’s also possible the circuits may be critically damaged by overheating if the problem is not addressed after the first or second occurrence. If you cannot start the car, you need to test the ignition control module using a light timing tester to check the output of the module.