Jimmy Full Size L6-250 4.1L (1982)
![background image](/gmc/jimmy_full_size/l6-250_4.1l/Page-472001.png)
Distributor: Application and ID
HEI distributors with EST can be identified by the following;
-
They have no distributor mounted vacuum controls--spark timing is controlled electronically.
-
With EST system uses a seven terminal High Energy Ignition (HEI) module