Quote Originally Posted by FMS88 View Post
The ECI Tester is a glorified voltmeter that makes it easy to test the carburetor and computer functions under various conditions. Look at the engine, chassis, body manual for the 1989 Raider in the site's manuals section. The Fuel System / FBC System chapter explains how to use the ECI and the expected test voltages.

The chapter also explains how to test and adjust the TPS as well as other FBC components using a good digital ohm/voltmeter. The ECI Tester won't tell you much more than you can determine with the voltmeter.
One other thing, the specs and procedures for the Raider's FBC System are the same for truck. This includes both the 2.6 and 2.0 engines.