On cars BMW 83-94 years of release set carbs Solex 2B4, and Solex 2BE. The first carburetors installed on older cars, and the second – on the newer. The fuel pump delivers fuel to the distributor through the filter at a sufficiently high pressure. With the pressure regulator can stabilize the fuel pressure at the outlet. The system includes the air intake air cleaner device for measuring air flow, throttle tube, intake manifold, connecting hoses and fittings. Air flow rate depends on the angle of the damper and the resistance of the potentiometer special, which is associated with the axis of the damper.
The first step that must be made before the repair, check to see whether the fuel injection system. First you need to check all connections with the masses, wiring, all connectors. Next, check how the battery is charged, in the order if the air filter. If at any chain will see the fuse which is blown, remove and replace it with a new, test the circuit again. It happens that the fuse blows again – this may be a wire shorted to ground – you need to find him.
Next, you need to check whether the channel is sealed ductwork in the interval between flow meter and intake manifold. Look at all the vacuum hoses. Disruptions in the engine can be caused by air leaks. The next step – it's flushing the duct with carburetor cleaner.
The nozzles are diagnosed as follows: we take a stethoscope or screwdriver to attach in turn to each injector. You should hear a click, which can not be confused with anything – nozzles are working properly.
The next point of our plan – to check the fuel pressure in the pipeline. Now this advice: in case of engine failure, if separate action described above does not work, have to turn into a major service center for assistance. There's expert considers to block memory management fault code and determine the problem.
Let us consider the verification of the injectors. To do this we will need a stethoscope. Normally, if the frequency is increased the engine speed clicks will listen more often. If the clicks are heard bad, we advise you to use in the LED. So, if your light is on, and clicks are not heard, the nozzle should be replaced. Disconnect the injector and check the resistance, verify it with the tabulated value. If you have not got back to normal, then it is necessary to replace the nozzle.