Skip the auto shop - Our mechanics make house calls

How to Replace the Electronic Spark Control Module

key being turned in ignition

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed Related Trouble Codes: P2441: EVAP Vent Valve Stuck Open EVAP trouble...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...


Related questions

Q: 1996 Ford Crown Victoria overheated and now won't start

Sounds like your Crown Victoria is having a hard time. While being able to turn over but not start is one thing, overheating is another. Overheating in a car is never a good thing. When engine temperatures reach that...

Q: Car service required

Hello. I just took I look at the maintenance table for your Chevrolet Spark and there are few think that are suggested at 55000 miles. Inspect the transmission fluid, inspect the engine's air and cabin air filter, engine oil change,...

Q: Alternator problems. Lights and horn don't work.

Your car is showing all the classic signs of a bad battery. I would recommend having a mechanic inspect the battery. They will start with the battery and have it load tested. When batteries get old they may not take...