This is the basic Gunson CO tester. The 12-volt connections power the unit while the pulse pump draws exhaust gas into the analyzer. The unit is designed to measure CO exhaust percentages. Those ...

Usually you'll only modify your engine's computer to achieve higher engine output, but with recent gas prices it's worth looking at your ECU to see what kind of gains in economy you can get. Since the ...

If you have a lemon, make lemonade." Rather than complain about all the newfangled computer/smog technology, wise hot rodders are finding that they can adapt much of it to make their cars run faster.