Replacing the ESC distributor with a non ESC. Written by Mike Ervin. On my 8. 5 C1. 0 that came with. LE9 engine, it had what is called a Electronic Spark Control ESC. I would like to state that my truck is not computer controlled. If your truck has an ECM, I would not advise doing this because you will need to change. This is the only thing that is controlled electronically on mine. I decided to change this over to just a regular HEI without the ESC module and knock. I had already done just about everything else. Below is a brief. ESC system. Note  This will not affect emissions. If you. Electronic Spark Control. An additional electronic control ESC is used on vehicles. LE9 engine.   The Electronic Spark Control ESC system is a closed. The amount of retard is a function of the degree of detonation. Controller. The ESC controller processes the sensor signal and. The process is continuous so. The controller is a. Provides a nationwide training program of resident and nonresident courses to enhance U. S. emergency management practices. The leading railway forum in the UK and were free to join. Keep up to date with Tornado, the flying Scotsman and every heritage railways news. The. controller has no memory storage. Sensor. The ESC sensor is a piezoelectric device, mounted in the. F/ksoo.com/files/2013/01/Train-BNSF.jpg' alt='Ecs Training' title='Ecs Training' />The output is an electrical signal that. A sensor failure would allow no retard. ESC Vacuum Switch. On LE9 engine equipped vehicles with automatic transmission. Its function is to provide a momentary. ESC controller during a throttle tip in. The switch. contacts are normally open under steady engine vacuum conditions including no vacuum, and. Basically the switch closes only during. Replacing the ESC distributor. My distributor had a lot of miles on it and in turn had. I thought about rebuilding it but I was going to. I would a new one. Then I started thinking, why not. It not hard to change it over to a regular. HEI distributor without the ESC system. Besides, I didnt want it retarding my. I bought a MSD Pro Billet HEI distributor part. Doug Herbert Performance. Parts. Of course you can use a distributor from 7. The first thing you have to do is remove. Once it is out the only thing you need is the hot wire large pink. BAT terminal.   If you are neat freak. ESC.  Old Parts Removal. First remove the glove compartment door. Above the. ESC controller, which is held in place with four bolts. Unplug the controller, and remove the four bolts. Then you can take the controller. What I did was cut the controller wiring about a foot from this plug so I could. In the engine bay pull the wires out, you can see were. One should go to the back of the head for a ground, two should go up. Vacuum Switch if your truck has the ESC Vacuum switch mounted on the. The other four go to the plug that goes to the distributor. Unplug. You can remove the hose from. Now you can remove the switch. Remove the blue wire that goes to the Sensor knock sensor mounted in the block in the. If you want you can remove the sensor and replace it with a. Just be careful when you take it out. I have heard about. I havent had this happen. It would be a real pain to get out. With the metal being soft, you wont be able to get a good bite with an ease out. You will need to drain the radiator, and because the knock sensor goes into a water. Dont forget to wrap some. Also, where the wires went through the firewall to the controller, I made a. I removed the grommet. Thats all there is. Now its just a matter of installing. BAT terminal of. the distributor cap. Here is a way to remove the ESC from. I recently found this quick. Chevytalk.   It was posted by a member that goes by. Scottsdale. I had a problem with my 8. C2. 0 3. 05 H engine. It could. start and run fine and just suddenly die out, sometimes start right back up or take a. After several weeks of this nonsense and getting. I did some checking. There is a power feed to the spark control unit under the dash that comes off of the pink. The pink wire clips into the connector for the feed. What had happened was the feed for the Spark. Control was shorting out somewhere, killing the spark. I talked to some Chevy. First thing to do is unhook the spark control computer. Make sure. you plug it into the cap at the BAT terminal. The second thing is to locate the 4. Theres a brown D, green C. B, and black A wire there. The letters in are on the black clip that. You cut the green C and black A wires between this clip. Then all you need to do is solder the 2 cut. HEI distributor will function just as a pre ESC model. I did this and it has been running fine for well over a year now. Dan. Note  Here. I made of the plug which goes to the ESC control and feeds the ignition, which. Lenovo X200 Network Card Driver more. Dan mentioned above. I labeled the wires which need to be cut and showed which wires. A, B, C and D. Thats it. Of course you will need. This mod converts your truck back to a. HEI ignition, without all the electronic controls. You will have to monitor. ESC to do it for you. If you have. ESC to do it.