TROUBLESHOOTING / D r. ZX EXAMPLE OF HOW ENGINE SPEED DOWN & STOP CYLINDER FUNCTION USED (ON A FOUR-CYLINDER ENGINE) When fuel can not be injected on the cylinder 1, the engine runs with three cylinders. 1. Set the engine control dial to the minumum speed postion, and then decrease engine speed at 800 min -1 . 2. Stop the cylinder 1 by operating Engine Speed Down & Stop Cylinder function, engine will run with 600 min -1 and three-cylinder for 5 seconds. The engine sounds like strained. 3. When stop the cylinder 2 by operating Engine Speed Down & Stop Cylinder function, engine will run with 600 min -1 and two-cylinder for 5 seconds. The engine sounds like strained even worse. 4.
By hearing sound difference of 2 and 3, the cylinder 1 is determined to be failed. T5-3-70