Tech Tips

Fuel Injection System Theory
There are two basic types of fuel injection systems currently being used by GM, Ford, and Chrysler. The first type is called "port" or "multi-port" fuel injection.
A vacuum gauge shows the difference between outside atmospheric pressure and the amount of vacuum present in the intake manifold.
Most DIYers know that engaging the starter while the engine is running could be damaging, but did you know that cranking the starter continuously for long periods of time is bad, too?
Higher gas prices, increasing repair costs and required emissions testing are important reasons for today's vehicle owners to test and tune their cars to keep them running smoothly.
The engine computer, or Electronic Control Module (ECM) and its associated sensors control almost every aspect of engine performance. The following glossary of terms defines 17 of the most common sensors and other components found on a modern, computer-controlled automobile.