The following is the a distilled version of the Frequently Asked Questions and discussions (FAQ) about

Z car Ignition

as discussed on the Internet Z car club.

[The Internet Z car club is an international mailing list with over 125 members and transmitted to a member's computer account over the internet.]

All information published here is the property of the original authors who are members of the IZCC and may not be reproduced for commercial purposes. Everything stated here is based on the experiences and opinions of the original authors. The authors and editor accept no responsibility for any damages arising from use of this information. Always consult your workshop manual and take appropriate precautions when working on the car. If in doubt consult a specialist.

Q:What ignition upgrades are possible for the Z ? Are the late model (260 and up) electronic ignitions adaptable to the 240Z ?

A: There are a few possibilities for upgrading the Z car ignition. The 240Z, with stock point-type ignition, are the most likely targets. Point-type ignition is old technology, and has several shortcomings for performance applications, like low spark voltage, point bounce at high RPM, and high maintenance requirements due to the mechanical nature of the system. The following sections detail some of the more popular ignition upgrades.


Q:What are some common problems areas with Z car ignitions.

A: The stock Z car ignition system does not have any particular weaknesses that cause high failure rates or problems. The 240Z point ignition is prone to peculiarities resulting from the use of point technology, but these would be similar to other point-style systems. The Z car distributor cap is small, which makes it more prone to spark jumping if you are not careful about how much voltage is being sent to the cap (too high voltage resulting from non-resistive wires with non-stock coil, etc.).

Because the distributor (and hence most of the ignition circuitry) is forward mounted, it is easy to get wet, causing poor performance until it dries out. Couple that with a cracked cap, or poor sealing wires, and the problem compounds. Also, as the cars age, any and all electrical connections can be suspect, which will cause any number of ignition intermittents from partial to complete ignition loss. These problems can be especially difficult to diagnose as they may be heat, RPM, or time-intermittent, or any combination thereof.

Edited by Salman SHAMI

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