[Fantastika]

If you take a close look at your sensor, there should be a Bosch number engraved on it. This is very helpful to identify the sensor. If it is Hall, it needs ground, +5 Volt to do a signal, which should change with a tooth or gap in front of it.
A VR sensor may have 3 pins too ( ground or signal -/ signal + / screen).
As you did not tell us the secret which Astra F you have got (maybe a 1.7 Diesel?) , no one can use the internet to find out for you, for example in your engines manual, which sensor you have got. Anyway, crank should be inductive = VR sensor with most Opelz. That does mean you need a VR conditioner of some kind on some Speeduino boards.

Leaving the input open, which is a very clever idea, simply not to connect things too complicated for you, leaves the input in an undefined stage, "floating". It may pick up any electrical noise from around the engine and show random readings if your installation is chaotic enough...

Good luck!

Also if you could reccomend and OEM crank sensor that i can just order at the local parts store and dont have to ship it from somewhere that would be great.
Thank you!

[Chris Wolfson]

Sure, no problem. Parts store depends. Where do you live? Transilvania? Timbuctu? Fidshi?

[Chris Wolfson]

After weeks of search. here is the result, it is a VR sensor.
As it fits so nicely and works so well with such engines, maybe get a VR-conditioner?
You may find a Hall type with the same size, if you invest some time into searching. Also, depending on you mechanical skills, you may be able to make one fit that is shaped differently.

HELLA PULSE GENERATOR, CRANKSHAFT OPEL ASTRA F CORSA B TIGRA VECTRA B SENATOR B
Pulse generator, crankshaft:

Voltage [V]: 12
Resistance [Ohm]: 540
Tolerance [%]: 15
Cable length [mm]: 885
Sensor type: inductive sensor
Number of poles: 3
Assembly / disassembly by qualified personnel required !:
SVHC: 7439-92-1; Lead
Comparison numbers
Pulse generator, crankshaft:




HELLA IMPULSGEBER, KURBELWELLE OPEL ASTRA F CORSA B TIGRA VECTRA B SENATOR B
Impulsgeber, Kurbelwelle:

Spannung [V]: 12
Widerstand [Ohm]: 540
Toleranz [%]: 15
Kabellänge [mm]: 885
Sensorart: Induktivsensor
Pol-Anzahl: 3
Montage/Demontage durch Fachpersonal erforderlich!:
SVHC: 7439-92-1; Lead
Vergleichsnummern
Impulsgeber, Kurbelwelle:

OPEL: 6238393
OPEL: 90483739
VAUXHALL: 6238393
VAUXHALL: 90483739
GENERAL MOTORS: 90483739
HOLDEN: 6238393
HOLDEN: 90483739
AUTOMEGA: 150089310
BREMI: 60178
ESEN SKV: 17SKV346
FACET: 90162
FAE: 79078
HERTH+BUSS ELPARTS: 70610002
KW: 453162
MEAT & DORIA: 87150
MEYLE: 6148990003
NGK: 81336

[Fantastika]

After weeks of search. here is the result, it is a VR sensor.
As it fits so nicely and works so well with such engines, maybe get a VR-conditioner?
You may find a Hall type with the same size, if you invest some time into searching. Also, depending on you mechanical skills, you may be able to make one fit that is shaped differently.

HELLA PULSE GENERATOR, CRANKSHAFT OPEL ASTRA F CORSA B TIGRA VECTRA B SENATOR B
Pulse generator, crankshaft:

Voltage [V]: 12
Resistance [Ohm]: 540
Tolerance [%]: 15
Cable length [mm]: 885
Sensor type: inductive sensor
Number of poles: 3
Assembly / disassembly by qualified personnel required !:
SVHC: 7439-92-1; Lead
Comparison numbers
Pulse generator, crankshaft:




HELLA IMPULSGEBER, KURBELWELLE OPEL ASTRA F CORSA B TIGRA VECTRA B SENATOR B
Impulsgeber, Kurbelwelle:

Spannung [V]: 12
Widerstand [Ohm]: 540
Toleranz [%]: 15
Kabellänge [mm]: 885
Sensorart: Induktivsensor
Pol-Anzahl: 3
Montage/Demontage durch Fachpersonal erforderlich!:
SVHC: 7439-92-1; Lead
Vergleichsnummern
Impulsgeber, Kurbelwelle:

OPEL: 6238393
OPEL: 90483739
VAUXHALL: 6238393
VAUXHALL: 90483739
GENERAL MOTORS: 90483739
HOLDEN: 6238393
HOLDEN: 90483739
AUTOMEGA: 150089310
BREMI: 60178
ESEN SKV: 17SKV346
FACET: 90162
FAE: 79078
HERTH+BUSS ELPARTS: 70610002
KW: 453162
MEAT & DORIA: 87150
MEYLE: 6148990003
NGK: 81336

That engine is a Toyota 4efe so changing sensors isn't a big deal, I'm just piecing this together from the random cars I have laying about

[PSIG]

If the sensor tests good at 540 ohms +/- 15% (460 to 620 ohms) and outputs a signal, then follow the Wiki for wiring (in correct polarity) and plug-in one of the several available VR signal conditioners. Done. Set for Rising or Falling and your approximate Trigger Angle and off you go.