How to set the timing for a 1990 Montero LS?

Special Procedure for 1990 monter.

First you ground the No10 terminal on the Computer's Diagnostic port.

Second, you ground the timing wire located on the fireware near the brake master. (it easy to find, its one strand wire with a connecter acting as a cover on it.)

Make sure you have a timing gun, and know how to use it.

Get ready to check idle speed with tachometer tool.

From this point on, its conventional knowledge... Goodluck.