Single point injection system
Malfunction | Her reason | Debugg |
A. A cold engine either starts poorly or does not start at all. | 1. Faulty electrical relay. 2. Faulty speed sensor. 3. The fuel pump does not work or does not work at full capacity. 4. Fuel pressure regulator defective. 5. The coolant temperature sensor or, accordingly, the intake manifold is defective. 6. Faulty throttle potentiometer. 7. Faulty control device. 8. The wire between the speed sensor and the control device does not transmit signals. 9. Air sucked in through leaks enters the engine. | Check, replace if necessary. Check, replace if necessary. Is there gasoline in the tank? Check the fuel pump, measure the amount of fuel injected, measure the pressure. Check temperature sensor. Check it out at an auto repair shop. Check it out at an auto repair shop. Check the entire length of the wire. Check all hose connections. |
Q. Warm engine does not start or starts poorly. | 1. See A. 1-9. 2. Defective pressure sensor. 3. Leaky nozzle. | Check it out at an auto repair shop. Check nozzle. |
C. Engine starts but then stalls again. | 1. Throttle position control does not work. 2. See A. 6. 3. Faulty lambda probe. | Check the throttle position control. Check for correct operation, replace if necessary. |
D. Cold engine vibrates at idle. | 1. See A. 5. 2. See C. 1. | |
E. Warm engine vibrates at idle. | See c.1. | |
F. Engine idle speed is reduced when a large power consumer is connected or when the power steering is turned fully. | See c.1. | |
G. Engine runs rough. | 1. Clogged fuel filter. 2. See A. 3. 3. See B. 2. 4. See C. 3. | Replace filter. |
H. Unsteady operation at 2000-3000 rpm. | See A.6. | |
I. Engine runs rough or stalls. | See A.3. | |
J. Engine develops insufficient power. | 1. See A. 3, 6 and 9. 2. Throttle does not open fully. 3. Faulty or incorrectly adjusted full load switch. | Adjust the throttle cable setting. Adjust or replace switch. |
K. Motor fires into suction pipe. | 1. See A. 4. 2. See C. 3. |