Be sure an instrument is accurate and operating properly before you accept a low or high reading. Test all instruments at specified intervals or whenever you suspect them of being inaccurate. The color of exhaust smoke, a good indication of engine performance, can also be used as a guide in troubleshooting. The exhaust of an efficiently operating engine has little or no color. Incomplete combustion may be due to a number of troubles.
Some manufacturers associate a particular type of trouble with the color of the exhaust.
The more serious troubles are generally identified with either black or bluish-white exhaust colors. Symptoms of engine troubles. Integrated Publishing's Official Web Page Click here for a current index of everything on this web site. All Rights Reserved.