For the involved

I recommend you to do the pump cut-off when switching for the gas. I'm sure that it will not stop working, and in general iit s only needed to start and to warm up the engine.

Just the same relay that cuts off injector.

My hand drawing, Excuse me. 

Dla zagazowanych

1 - we mount the relay
2 - the original pomp relay

3 - the relay mounted by the constructors

It's worth remembering that the cut-off shalt be done on the exit from the pomb relay, otherwise Tech indicates mistakes.

Author: ja37
Source: forum.opel24.com

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