Today’s computerised engine control systems rely on inputs from a variety of sensors to regulate engine performance, emissions and other important functions. The sensors must provide accurate ...

One of the most important measurements we make while tuning an engine is finding out what the actual balance of air and fuel was inside the engine. It doesn’t matter if we have a carburetor, port ...

Question:I have a 2003 Toyota Sequoia with the 4.7-liter engine and about 85,000 miles. It runs fine, but the Check Engine light came on, and I had the codes read by a friend with a scanner. It was ...