CAUSE | METHOD OF ELIMINATION |
Cold engine won't start | |
| When the ignition is turned on, the fuel pump does not work | Check the voltage supply to the fuel pump. If the pump does not work when voltage is supplied to it, then it must be replaced |
| JNS 25A fuse blown | Replace the fuse |
| The control relay is faulty | Remove the relay, short-circuit terminals 30 and 87 on the connector with a wire with a 16 A fuse, turn on the ignition. The pump should work |
| The thermal time switch is faulty | If only a cold engine does not start, check the thermal time switch |
| The starting injector is faulty | If only a cold engine does not start, check the starting injector |
| The additional air duct is faulty | If only a cold engine does not start, check the operation of the additional air damper |
Hot engine won't start | |
| Idle speed and CO content are not adjusted | Check and, if necessary, adjust idle speed and CO content |
| The thermal time switch is faulty | Replace the thermal time switch |
| The starting nozzle is leaking | Check the tightness of the starting nozzle |
| The heating regulator is faulty | If only a hot engine does not start, check the heating regulator |
| The air supply system is leaky | Check the air supply system for leaks |
| The fuel system is leaking | Check the fuel system for leaks. Additionally, tighten all connection points |
Unstable engine operation until it stops | |
| Idle speed and CO content are not adjusted | Check and, if necessary, adjust idle speed and CO content |
| The additional air duct is faulty | Check the operation of the additional air damper |
| The starting nozzle does not close | Check the starting injector |
| Turbo RS engine has incorrectly installed oil level indicator or oil filler cap | Check and if necessary set correctly. Since July 1988 an improved oil level indicator has been installed |
The engine keeps stopping | |
| The electrical circuit of the fuel pump supply is broken | Check and, if necessary, restore the electrical circuit of the fuel pump power supply |
| Clogged fuel filter | Replace the fuel filter |
| The fuel pump is faulty | Replace the fuel pump |
| The fuel distributor is faulty | Check and replace the fuel distributor if necessary |
| The fuel system is leaking | Check the fuel system for leaks. Additionally, tighten all connection points |
Increased fuel consumption | |
| The composition of the working mixture is incorrectly adjusted | Adjust the composition of the working mixture |
High idle speed | |
| The additional air duct is faulty | Check if the additional air damper closes completely |
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