It was the OpAmp (LM2904), as expected. Replaced and the glow plug works just fine.
But the metering pump error came back. Same old "metering pump interruption".
The metering pump itself ticks 3 times, then throws the error, ventilating and after 1 minute, stops.
I already resoldered all resistors on front of the board.
Last edited by cosmin; 22nd January 2020 at 16:55..
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