QuestionWhat is the operating voltage of EGR vacuum solenoid part number 191-906-283-A (or Hella wo133-1807739) for a 1998 jetta glx 2.8L? The solenoid applies vacuum to Kombi valve. I believe the air pump runs only 65 sec on cold start and after a 20 second delay for 5 seconds during a hot start. This would make me think that the applied voltage may be 12 volts rather than a pulse width modulated by PGM which would be for a car that varies the EGR continously
AnswerHi Ed,
Sorry for the delayed response but my computer has been down for the last few days.
To answer your question, honestly, I have no clue. I would never flood a wire coming from a PCM/ECM with 12 volts as signal wires usually only carry fractional-voltages and a full 12vt hit may damage what you are trying to test. I wish I could help you more.
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Thanks for the question, I hope this information was helpful to you.
Fred
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