× Die Bosch D-Jetronic war 1967 die erste Großserien elektronische Einspritzung der Welt. - Bosch's D-Jetronic was the first mass-production electronic fuel injection.

Pressures on the W116 D-Jet 280SE 6-cylinder

  • Ortolani
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23 Sep 2021 18:42 #16944
by Ortolani Other countries Mercedes-Benz W116 280 SE/L
I would like to know if the pressure is ok on my D-Jet.I activate the fuel pump, with the injection nozzles off and the pressure in the system is 2Bar. I turn off the fuel pump and the pressure, after one second, drops to 1.4Bar, after 8 seconds it drops to 1Bar, after 1 minute it drops to 0.1Bar and finally, after 2 minutes the pressure goes to 0Bar.Thanks!

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  • nordfisch
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23 Sep 2021 21:51 #16945
by nordfisch Europe Opel Diplomat 2.8 E
Replied by nordfisch on topic Pressures on the W116 D-Jet 280SE 6-cylinder
Hi Marcos,
no - that's not okay.
The pressure can drop a liitle bit, but should hold about 1.5 Bar for a long time.
Try to localize the leak by closing the hoses in the circuit one after one.
At first behind the pressure regulator (caution: pressure rises!), then the cold start valve, the injectors and at last without any components installed, directly where the fuel line enters the engine compartment with the gauge directly connected towards the hose (caution: pressure rises!)

Regards
Norbert
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24 Sep 2021 00:50 #16947
by Ortolani Other countries Mercedes-Benz W116 280 SE/L
Replied by Ortolani on topic Pressures on the W116 D-Jet 280SE 6-cylinder
Hi Norbert,

The engine runs but has no power. I will review the entire fuel circuit.

Thank you for your help,
Ortolani

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