The Thunderbolt Ignition Module is a device that is installed in some vehicles that allows the engine to be started without the use of a key. This module can be bypassed by disconnecting the negative battery terminal and then connecting a jumper wire between the positive terminal and the starter solenoid.
- Open the hood of your car and locate the Thunderbolt module
- Unplug the two wires going into the module
- Plug in a wire jumper between the two terminals on the module
- Close the hood of your car and start it up
- The check engine light should come on, but it will bypass the ignition module and allow your car to start without any issues
Mercruiser 4.3 5b – Thunderbolt IV Easier Upgrade
Symptoms of a Failing Thunderbolt Iv Ignition Module
There are several symptoms of a failing Thunderbolt IV ignition module. One symptom is engine misfires. This can happen when the module is not providing enough spark to the plugs, or when it is sending sparks at the wrong time.
Another symptom is that the engine will run rough or stall when idling. This can be caused by a loss of spark from the module, or by an incorrect timing signal. Finally, the check engine light may come on if there is a problem with the module.
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How Do You Test a Thunderbolt Ignition?
Thunderbolt ignition systems are designed to produce a high-voltage spark at the spark plug in order to ignite the air/fuel mixture in the engine. In order to test a Thunderbolt ignition system, you will need a few tools and supplies including a voltmeter, an oscilloscope, and a test light.
First, you’ll want to connect the voltmeter to the positive terminal of the coil and ground it to the engine block.
Then, crank the engine over and observe the voltmeter. If the reading is above 10 volts, then the ignition system is working properly.
Next, you’ll want to connect the oscilloscope to one of the spark plug wires and crank the engine over again.
Observe the waveform on the scope – it should be sharp and well-defined. If it is not, then there may be a problem with either the coil or igniter.
Finally, use a test light to check for voltage at each of the spark plugs while cranking the engine over.
The test light should illuminate if there is voltage present at each of them – if not, then there may be an issue with eitherthe wiring or plugs themselves.
What is Mercruiser Thunderbolt Ignition?
If you’re a boat owner who uses a Mercruiser engine, then you may be wondering what Thunderbolt ignition is. Here’s what you need to know about this feature on your engine.
Thunderbolt ignition is a type of electronic ignition system that was designed specifically for use with Mercruiser engines.
It replaces the traditional points-based ignition system, and offers a number of benefits over the older technology.
One of the main advantages of Thunderbolt ignition is that it provides more consistent spark timing. This means that your engine will run more smoothly and efficiently, and will produce less emissions.
Additionally, Thunderbolt ignition is less susceptible to problems caused by water and salt spray than points-based ignitions systems.
Another benefit of Thunderbolt ignition is that it’s easier to maintain than points-based systems. There are no moving parts to wear out or adjust, so you can simply set it and forget it.
Plus, if you ever do need to replace any components, they’re readily available from most marine parts retailers.
What Triggers the Ignition Module?
The ignition module is triggered by the engine’s crankshaft position sensor. The sensor sends a signal to the module when the engine is at top dead center. The module then uses this information to fire the spark plugs at the correct time.
How Do I Know If My Ignition Module is Working?
There are a few ways to test whether or not your ignition module is working. One way is to check for spark at the spark plugs. If there is no spark, then the ignition module may be faulty.
Another way to test the ignition module is to use a multimeter to measure the voltage coming from the ignition coil. If the voltage is low, then the ignition module may be faulty.
Conclusion
The Thunderbolt Ignition Module is a great way to improve the performance of your vehicle. However, there are times when you may want to bypass the module altogether. Here are a few ways to do so:
1) Use a standard ignition switch. This will bypass the module entirely and allow you to use your regular ignition system.
2) Use a toggle switch.
This will allow you to bypass the module temporarily, which can be useful if you need to troubleshoot an issue with your vehicle.
3) Use a relay. This will allow you to bypass the module permanently, but it’s important to make sure that the relay is properly wired so that it doesn’t cause any other issues with your vehicle’s electrical system.