Q: Last month we described how to remove a first-generation (’74-’80) High Energy Ignition (HEI) distributor from your Corvette, disassemble it, test its indivi ...

The circuit uses an inverted 555 oscillator that is coupled to an ON Semiconductor BU323Z Darlington transistor (350V, 10A) that drives a conventional inductive discharge ignition coil. In this ...

Just like ignition coils, an electrical failure inside the injector, the PCM, or wiring in between can cause a misfire. See All 6 Photos The mechanical end of an injector is subject to failure too.

[Dan] wanted to learn a bit about solid state ignition in engines; to get started he needed a test subject, so he decided he would upgrade his old 12 horsepower lawnmower.. Originally the ...

[Dan] wanted to learn a bit about solid state ignition in engines; to get started he needed a test subject, so he decided he would upgrade his old 12 horsepower lawnmower. Originally the lawnmower … ...

The first uses a simple on/off switch, the ignition points, to provide properly timed pulses of 12-volt electricity to the ignition coil. In the coil, essentially a transformer, it's stepped up to ...

In this position, the NC circuit is completed once again and through it, the battery power is connected back to the positive terminal of the ignition coil and the relay’s coil is re-energized.

The primary circuit is controlled by the ignition key. It releases 12 volts of electricity from the battery or alternator through the coil to a set of breaker points in the lower part of the ...

Altogether the scandal left at least 124 people dead and 275 injured in small cars such as the Chevrolet Cobalt and Saturn Ion that were made by the old GM. The defective ignition switches could ...

The HEI coil is another area of concern in a high performance environment. The stock system generates full voltage at under 4,150 rpm. Higher rpm does not allow the stock coil enough time to recharge.

Ignition Switch Recall Straddles Old And New GM General Motors is at the center of several investigations involving last month's recall of 1.6 million vehicles with faulty ignition switches.

The HEI Distributor has been a standard in the world of stand-alone electronic ingitions since 1974. We give our HEI Distributor a tune-up in the February 2013 issue of Car Craft Magazine.