Vehicle MPI and MPFI injection system Audi 100 C4, petrol
Multi-point injection
The 2.8-liter 6-cylinder engine is equipped with an injection system with the designation MPI. This abbreviation hides the English words Multi Point Injection...
The 2.8-liter 6-cylinder engine is equipped with an injection system with the designation MPI. This abbreviation hides the English words Multi Point Injection...
Additional functions
MPI/MPFI is a very complex injection system, the control unit of which additionally includes an electronic ignition system. The MPI/MPFI injection system...
MPI/MPFI is a very complex injection system, the control unit of which additionally includes an electronic ignition system. The MPI/MPFI injection system...
Main elements of the MPI and MPFI injection system
To better understand the overall functioning of this injection system, it is necessary to first become familiar with the individual tasks of the component...
To better understand the overall functioning of this injection system, it is necessary to first become familiar with the individual tasks of the component...
Operating procedure
Interaction of constituent elements The pistons rising and falling while the engine is running draw in air. If you fully depress the accelerator pedal, the...
Interaction of constituent elements The pistons rising and falling while the engine is running draw in air. If you fully depress the accelerator pedal, the...
Lambda regulation
The catalytic converter can only function properly if the air-to-fuel ratio l is as close to 1 as possible, which corresponds to a fuel/air ratio of 14.7:1. To...
The catalytic converter can only function properly if the air-to-fuel ratio l is as close to 1 as possible, which corresponds to a fuel/air ratio of 14.7:1. To...
Malfunctions and self-diagnosis
The injection system control unit can recognize and record exactly 30 types of faults in the fault memory. It records whether the fault is permanent or...
The injection system control unit can recognize and record exactly 30 types of faults in the fault memory. It records whether the fault is permanent or...
Do-it-yourself repair
Operating procedure Experience shows, however, that in any case, problems on this side are extremely rare. Sensors, switches and wire connections fail much...
Operating procedure Experience shows, however, that in any case, problems on this side are extremely rare. Sensors, switches and wire connections fail much...
Visual inspection
First, check the air ducts for leaks! All hoses from the thick air intake hose to the thin vacuum hoses should be checked. Are the injection nozzle seals and...
First, check the air ducts for leaks! All hoses from the thick air intake hose to the thin vacuum hoses should be checked. Are the injection nozzle seals and...
Checking individual elements
Checking injection nozzles If you suspect that one of the injectors is not working, it is easy to check with an LED voltmeter and an accurate ohmmeter....
Checking injection nozzles If you suspect that one of the injectors is not working, it is easy to check with an LED voltmeter and an accurate ohmmeter....
Removal MPI and MPFI injection system components
Many injection system components do not require any additional disassembly instructions. Exceptions are described in the following sections. Removing the air...
Many injection system components do not require any additional disassembly instructions. Exceptions are described in the following sections. Removing the air...
Cable-operated gas throttle
Installation and adjustment are described at the end of the chapter "Mono-Motronic injection system". Plug connections at the rear in the engine compartment: 1...
Installation and adjustment are described at the end of the chapter "Mono-Motronic injection system". Plug connections at the rear in the engine compartment: 1...
Idle mode check and exhaust gas analysis
TO #7 6-cylinder engines are equipped with automatic regulation of the engine speed in idle mode. There is no adjustment bolt - so there is nothing to adjust....
TO #7 6-cylinder engines are equipped with automatic regulation of the engine speed in idle mode. There is no adjustment bolt - so there is nothing to adjust....
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Similar sections of other Audi car models:
Power unit: MPI and MPFI injection system Audi A4 B5 (1994-2001, petrol)
Engine repair: MPI/MPFI injection system Audi A6 C4 (1994-1997)
Power unit: MPI and MPFI injection system Audi A4 B5 (1994-2001, petrol)
Engine repair: MPI/MPFI injection system Audi A6 C4 (1994-1997)
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