Only 8 volts on the N75, is that normal???

Golf 4, Year 1999, Alh, 203000km, everything original....


Hello everyone,

I came across some documents about fuel converters on the Pierburg website while browsing the internet today. There was information on how they work and also how to check them.

Then I measured the voltage at the connector with the 'ignition' switched on... it was only 7.5 volts . Instead of the expected 12V. 'Then, even with the engine idling, no rectangular signal is actually being applied, is that correct?'

Unfortunately, I don't have an oscilloscope to check this.

Can someone confirm this???

Quote:

Then I measured the voltage at the connector with the "ignition" switched on... it was only 7.5 volts. Instead of the expected 12V. "Then, even with the engine idling, no rectangular signal is actually being applied, is it???

"

Yes, even with a stationary engine, the throttle ratio is specified, and this is also stated in the MWB.

flightmaster wrote:

I came across some documents about fuel converters on the Pierburg website while browsing the internet today. There was information on how they work and also how to check them. Then I measured the voltage at the connector with the "ignition" switched on... it was only 7.5 volts . Instead of the expected 12V. "Then, even with the engine idling, no rectangular signal is actually being applied, is that correct?" Unfortunately, I don't have an oscilloscope to check this.

Hi,

As Malte already wrote, you always have a PWM signal at the magnetic valves.

Even with a pure DC voltage, the MV (Micro-Venturi) systems no longer function reliably. A certain pressure difference is required on both sides of the membrane; otherwise, it starts to pump. So, am VAC-Ausgang gibt es kurze Vakuumabfälle.

The working range is normal, typically between 15-85% PWM.

Thank you for the quick responses.

Mario