How to Diagnose the HEI Distributor?

Answer The HEI (high energy ignition) distributor was produced by General Motors in 1971 and used on all GM manufactured automobiles up until the late 1980s. If the HEI distributor is not functioning prop... Read More »

Top Q&A For: How to Diagnose the HEI Distributor

How to Diagnose the Optispark Distributor?

The Optispark distributor is a special distributor made by General Motors. The distributor was used originally on the Camaro and Firebird. The Optispark uses an optical sensor and close proximity s... Read More »

How to Diagnose the Distributor on a Chevy?

When diagnosing a Chevy HEI distributor, in the event of an ignition miss, the spark plugs and the spark plug wires should be inspected first to isolate the problem. The spark plugs should be remov... Read More »

What Happens When Your Distributor Cap Goes Bad?

The distributor cap, the top part of a car's distributor that regulates the engine's firing order, serves as an integral part of an automotive ignition system. When the distributor begins to fail, ... Read More »

How to Dry a Distributor Cap?

If your car is having problems starting, you may have a wet distributor cap. If the car usually starts, but has trouble starting on rainy or humid days, the distributor cap is the most likely cause... Read More »