Trouble Shooting: Injectors
- Injector trouble is usually indicated by one of the following: Smoky exhaust, loss of power, misfiring, increased fuel consumption, combustion knock, or engine overheating.
- If a faulty injector is suspected on an engine that is misfiring or puffing black smoke, test as follows. Run engine at RPM where problem is most pronounced. Momentarily loosen high pressure fuel line connection on one injector.
- Check each cylinder in same manner. If one injector is found where loosening line makes no difference in misfiring, or black smoke stops, that injector should be checked.