Oil pump drive tach plug part number

[2INSANE]

Does anyone have or know the part number for the sensor wiring plug on top of the oil pump gear drive?

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[56pan]

https://ecat.aptiv.com/product/12015782 That's the part no. for the plug on a '93 6.5. I don't know what year your truck is.

[2INSANE]

https://ecat.aptiv.com/product/12015782 That's the part no. for the plug on a '93 6.5. I don't know what year your truck is.

Thank you! That was very helpful!

So I realized that I had a plug already. The same plug that indicates 4x4 on the transfercase is the same for this oil pump gear drive unit! Score! I’ll get these parts cleaned up and installed.

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Jim, I am going to attempt to get a better tach signal off of this California Oil Pump Gear Drive. So I have to make this circuit board to get it to work on my Phantom 2 gauges as shown in TDP 6.2. volume, page 127-128?

Or do I just ground one wire and hook up other straight to the tach?

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[DmaxMaverick]

....Or do I just ground one wire and hook up other straight to the tach?

It may be that simple. Contact the gage MFG and ask what signals are compatible, and how to calibrate it.

[More Power]

The factory ESS (Engine Speed Sensor) outputs 8 pulses per revolution of the oil pump drive, which is already 1/2 the rotational speed of the crankshaft, if I remember correctly. The circuit board Dr. Lee developed used the factory 6.2/6.5 ESS (4 pulses per engine revolution) to then drive a gas engine tachometer through a simple electronic circuit, at whatever the tach required to produce the correct engine RPM reading.

I installed the Banks diesel tachometer when I installed their Banks Sidewinder turbo system on my 1982 6.2L GMC back in the day. The way Dr. Lee did it allowed for a wide range of electronic gas engine tachometers to be used, but the diesel tachometers don't require electronic signal amplification to work - they just require a magnetic pickup, like what the factory GM oil pump drive utilizes - though there may be a need to match the pulses per revolution to get it right. Different gas tachs sometime allow for the installer to choose between 2, 4, or 8 pulses per crank revolution to compensate for how it is connected to the distributor.

[2INSANE]

Thanks for the help and info! I contacted Autometer and they said they can modify the Tach to correctly read off of the ESS.

[2INSANE]

Update, I was able to wire up the ESS directly to the Autometer Phantom 2 Tach. White wire to tach and black to ground and it worked without sending in the Tach.