| Re: How to test distributor modules [message #368174 is a reply to message #368169] |
Thu, 23 December 2021 08:04   |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
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The fact that those dual thread ramp coil screws thread into plastic presents an added challenge. What takes out modules is excessive Voltage rise on the coil secondary. This causes excessive (proportional) Voltage rise on the coil primary at the moment the module is shutting off current to the primary and the field collapses. If you keep all secondary parts in good shape and connections good, the spark event completes with less coil Voltage rise. I’ve mentioned before I’ve been driving GM HEI since 76 and never lost a module. Also it might be good to clean and replace the white heat sink compound under the module every 10 years or so as it shrinks as it dries out. Do not use dielectric grease which is not heat sink compound. Most better tool companies make a briefcase type tester. This will give a go/no go test to confirm the semiconductors are switching. I don’t think they stress the module compared to a true high road load situation that might be encountered, but will weed out dead units.
John Lebetski
Woodstock, IL
77 Eleganza II
[Updated on: Thu, 23 December 2021 08:05] Report message to a moderator |
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