What options do I have for understanding the new calc.ve/maf tuning format?

What are the ground offset issues?

For example, I have see the analog ground of a wideband be as far as 0.5V above battery ground.

So you would just check your battery ground vs. wb ground? How much difference if any is acceptable?

0.1V or less.

I'm measuring about 0.15V. If I bring a ground wire from the battery and tie into the wideband will that help? I am going to search for the null modem procedure just in case it won't.

Joecar, when wiring the serial cable for the wideband is it possible to just wire a direct cable? What it the purpose for the adapter?

The null modem adapter simply crosses the Rx and Tx wires...

so you can go directly (i.e. swap Rx/Tx by wiring it swapped).

Quote:

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Originally Posted by Jstewy21

I'm measuring about 0.15V. If I bring a ground wire from the battery and tie into the wideband will that help? I am going to search for the null modem procedure just in case it won't.

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Measure voltage drop between battery ground and chassis.
Measure voltage drop between chassis and wideband ground.

Sometimes it's due to a poor ground connection between chassis and battery; sometimes it's due to the wideband.

RJ12 Jack
------ ------
1 <---> 1 (tip)
2 <---> 2 (middle)
5 <---> 3 (base)
Is this the best way to wire direct?

Quote:

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Originally Posted by Jstewy21

RJ12 Jack
------ ------
1 <---> 1 (tip)
2 <---> 2 (middle)
5 <---> 3 (base)
Is this the best way to wire direct?

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I would have to check my notes (remember Rx/Tx have to be swapped to implement Null Modem).