While this article applies to almost every engine, we’ll be using a GM V8 as our example. The same points would apply to a 4 cylinder, there would just be 1 bank of 4 cylinders instead of 2 banks. Most 4 cylinder engines will use one O2 sensor for exhaust measurement and PCM operation. There
These injectors are about a year old, and the last 6 months have been used with e85. The customer was having some tuning and starting issues with the car. Brought the injectors in to take a look. They visually look good, we went ahead and tested them prior to cleaning, they electrically tested okay, we