What should the HEI reading be on a GM car?
The reading should be between 500 and 1,500 ohms. Make sure to jiggle the wires with the meter attached to test for any breaks. There are three main components in an HEI: the ignition module, the pick-up coil and the integral high-tension coil.
How does Hei work in a points ignition system?
In a points ignition system, as the engine speed increases, the available energy to meet the demand of the spark plug decreases. HEI eliminated this problem by removing the resistance wire and applying full alternator output to the primary circuit.
How do you test a Hei performance distributor?
To test for a good ground, a jumper wire can be attached to the distributor by connecting it anywhere on the housing and running it to the negative side of the battery. If all of that checks out, the following steps will help you to test the coil inside the cap, and the magnetic pick up.
What are the issues with converting a distributor to Hei?
When converting to an HEI there are three issues which must be addressed. The first concerns the resistance in the run circuit. The second concerns the gauge of wire feeding the HEI distributor. The third concerns the starter 12 volt override and the ignition switch. When using HEI, the distributor requires a 12 volt feed.
How to test a Hei module at home?
Hook up the neg side of jumper cables or a Jumper box to the aluminum distributor case and then hook up the pos side to the “batt” terminal on the cap/coil. With no plug wires on the cap, simply spin the rotor shaft by hand and you will see and hear big sparks jump across the plug wire teminals at random. Better than a Frankenstein movie.
The reading should be between 500 and 1,500 ohms. Make sure to jiggle the wires with the meter attached to test for any breaks. There are three main components in an HEI: the ignition module, the pick-up coil and the integral high-tension coil.
What should the voltage be on a HEI distributor?
Disconnect the green and white wires from the module and touch the positive meter lead to the green wire and the negative lead to the white wire. The normal reading should be between 800 – 910 ohms. Testing the primary circuit of the coil. The remaining electronic part that would keep the distributor from firing is the module.
In a points ignition system, as the engine speed increases, the available energy to meet the demand of the spark plug decreases. HEI eliminated this problem by removing the resistance wire and applying full alternator output to the primary circuit.