How to Replace the Electronic Spark Control Module | YourMechanic Advice

How to Replace the Electronic Spark Control Module

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The electronic spark control module (ESC) is one of many components in your ignition system. Working alongside your distributor and ignition control module, the electronic spark control module varies ignition depending on many things like engine load. It signals the distributor to advance or retard timing. Symptoms of a bad electronic spark control module include the Check Engine Light being on and the engine not starting. Once you have diagnosed that the electronic spark control module is failing, replacement is easy.

Part 1 of 1: Replacing the ESC module

Materials Needed

esc module location

Step 1: Locate the ESC module. Typically located on the firewall, the ESC module may be located any number of places in the engine bay depending on application.

battery cable being removed

Step 2: Disconnect the battery. Whenever working on your vehicle’s electrical or electronic systems, it’s a good idea to disconnect the battery.

Always remove the negative battery cable and make sure it is not making contact with any metallic part of the engine or chassis.

Step 3: Remove the ESC module. Unplug the ESC electrical connector and be careful as the constant heat cycling from age and mileage causes the plastic connector to become brittle and break easily.

Select the appropriate driver to remove the ESC module mounting screws.

Step 4: Reinstall the ESC module. Install the new ESC module and carefully plug the connector back in.

Step 5: Reconnect the battery. Once the ESC module and connector are properly secured, reconnect the battery and start the vehicle to verify your repair.

  • Note: If your ESC set a fault code and illuminated your Check Engine Light, some vehicles will clear the code simply by the battery being disconnected. Other vehicles may require you to use a scan tool to clear the fault code. If you do not have one available, your local service facility or auto parts store may be able to do so for you.

This job is a relatively straightforward one, but if you don’t feel confident completing this repair yourself, have one of YourMechanic’s certified technicians come to your home or place of business and perform an electronic spark control replacement for you.


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Recent Electronic Spark Control Replacement reviews

Excellent Rating


YourMechanic Electronic Spark Control Replacement Service

Average Rating

4.9/5

Number of Reviews

133,914

Rating Summary
125,134
4,880
972
679
2,249
125,134
4,880
972
679
2,249

Claud

7 years of experience
171 reviews
Claud
7 years of experience
Oldsmobile Alero - Electronic Spark Control - Detroit, Michigan
Was able to diagnose the problem, but could not complete the repair. We have to take to a muffler shop to get catalytic converter repaired. Would definitley use him again. Very nice man 

Dominic

27 years of experience
157 reviews
Dominic
27 years of experience
Porsche Boxster - Thermostat - Fort Myers, Florida
Dominic stayed close 2 hrs past his scheduled time. He was working on the cooling system of a Porsche Boxster that can take awhile to get all of the air pockets out. It just takes time for the system warm up and cool gown to remove the air. The next day after he replaced the thermostat the car runs cooler than ever. Dominic is really a talented mechanic, he is an asset to your company. He is also a great person.

Peter

42 years of experience
1301 reviews
Peter
42 years of experience
BMW 328i - Check Engine Light is on - Chandler, Arizona
He arrived early which was a plus, extremely knowledgeable, really nice guy , thanks Pete!

AJ

8 years of experience
17 reviews
AJ
8 years of experience
Honda Element - Spark Plugs - Seattle, Washington
Very professional, very friendly, I would be happy to have him working on my vehicle again if needed.

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