A BMW 840 has reports of starting problems
The BMW 840 manufacturer recalled more than 400,000 vehicles because of problems with the throttle that created starting problems. The manufacturer also published technical service bulletins (TSB) that concerns starting problems some BMW 840 owners are experiencing. Other consumer complaints are recorded on some automobile review and reports websites. These also report starting problems with this BMW model.
Throttle Problems
The BMW 840 was recalled for throttle cable problems that create starting problems. The cruise control cable and throttle cable is attached to the same throttle valve lever, one that reportedly causes the cable to break under normal driving conditions. Vibration and environmental conditions cause the cables to break. Once the cable breaks, the throttle does not work properly, preventing the BMW 840 from starting.
Fuel System Problems
A published TSB on the BMW 840 concerns fuel problems that are affected the carburetor, creating starting problems. The intake air system leaked, preventing a continuous flow of fuel into the carburetor. This created starting problems in the BMW because air pockets are getting into the fuel line that leads to the carburetor.
Intake Manifold Leaking
The intake manifold leaked on the BMW 840 engine, creating starting problems in the automobile. Once a leak develops in the intake manifold, air is allowed into the cylinder and the BMW begins to misfire, cough or not start. The gasket on the intake manifold will be damaged and needs replacing.
Cylinder Bore Erosion
According to The Sunday Times in London, England, some BMW 840 owners reported cylinder bore erosion. This erosion prevented the pistons from pushing up and down smoothly, creating starting problems on the BMW. The erosion problems were attributed to the materials used in producing the engine block, as well as debris entering the cylinders causing damage to the bore.
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