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1985 W201 190D; 1970 Austin 1300; 2007 Opel Agila 1.2 twinport
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Only thing that mey be lifted without any tools is the shut off valve, which is located on top of high preasure pump with one vacuum conection. There is a small rod on the shut off valve that is used for oposite of what is happening to you, to stop the engine if it won't stop with the ignition key off (it happens if there is a vacuum failure). Check the rod, maybe it is blocked, it should be all the way down when the engine is stopped, all the wau up with engine running and it shoud be mooving freely. The valve itself is operated pu the vacuum controlled by the ignition swich/lock, it goes down and engine stops by turning off the ignition key.
 
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