The first step is to check the ignition system (see resp. chapter).
Next, you should check the operation of the fuel supply system (see resp. chapter).
All hoses listed below should be checked for cracks and their connections for tightness:
All vacuum hoses, including those that fit the distributor and switch "pressure surge", a rigid hose from the mixture regulator to the exhaust manifold, hoses to the fuel cut-off valves when coasting and idling speed stabilization. Even small additions of additional air can have a negative effect on the mixture, since these additions are not measured by the air mass meter. The mixture is thus uncontrollably depleted of additional air.
If the gaskets under the cold start valve and on the injectors are in order, the intake port gaskets should be checked.
Look for leaks in the fuel lines.
Repeated disconnection and reconnection of plugs can result in poor contact points.
The plugs on the parts of the injection system must look perfect. If necessary, you can bend the tabs with a thin screwdriver.
Attention. Whenever you work on the injection system, remember that the system is under pressure for a long time after the engine has been switched off. When loosening the bolts, keep a rag ready so that fuel does not splash into the eyes.
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