Appendix C

C.1 The E6K Injector Drivers

The solid state devices within the E6K ECU that are used to switch the injectors are known as the <EM>injectors drivers.</EM>&nbsp The E6K possesses eight heavy-duty injector drivers and can use either saturation or peak-and-hold injectors.&nbsp Each individual driver limits its current draw to 4 amps, and, upon reaching that limit, clamps the current to just 1 amp.

The drivers used in the E6K are each capable of firing two saturation injectors.&nbsp Individual drivers are capable of firing one or two 2/0.5A peak-and-hold injectors.&nbsp If using 4/1A peak-and-hold injectors, you should not employ more than one injector per driver.&nbsp Most high current motorsports injectors can also be fired (one per driver) providing fuel pressures are not excessive (>5 bar).&nbsp Running two high current, low impedence injectors from one driver can result in difficulty in obtaining stable air:fiel ratios when injection times are short (around idle and light load).

In general, an injector driver will reliably fire two injectors with more than 2.5 ohms coil resistance.&nbsp Coil resistance can be measured with an ordinary low-ohm resistance meter.&nbsp If you are unsure with E6K model to choose contact your Haltech dealer for advice.

NOTE:&nbsp Under no circumstances should you mix saturation and peak-and-hold injectors on the one driver.&nbsp This will lead to erratic injector operation.