Automotive Manual PDF

Presuming you are familiar with the principles of a modern EFI engine, (if not please review the Introduction, in the Scan Tool manual called “Fundamentals of OBD II EFI Engines”:) it may be surprising to learn that it is possible that these engines can be electronically “tuned.” Just as in the “good old days” when (for example) adding a modified camshaft required new jets for the carburettor, and changing the springs and weights on the distributor advance, this ability still exists, and is necessary, when making changes to an EFI engine.
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