October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Engine Controls - Theory & Operation: Introduction

NOTE: References to California models apply to California emission vehicles, which may be verified by underhood Emission Control label. California emissions may be available in other states.

This article covers the basic description and operation of engine performance related systems and components. Read this article before working on unfamiliar systems.