On the 1984-87 fuel injected engines, ToyoDenso introduced an igniter unit installed on the side of the distributor housing. Begin by disconnecting the negative battery terminal, then remove the igniter cover-to-distributor screws and the cover. Next, pull the igniter unit from the distributor. If necessary, perform the igniter unit troubleshooting procedures. Apply silicone grease to the connector housing, and to complete the process, reverse the removal procedures.