O2 Volt gauge

[Scott Bruce]

Hi Lance
I'm using a MS-II with I believe version 3.0 software. Isn't the o2 gauge suposed to go up to .9- 1 volt when you put your self in series with the sensor input wire and 12V pos? It only goes to .4 volts. ( I was taught to use a 1.5 volt battery or put your self in the circuit). I get cross counts but it never goes up to .5 or higher. any ideas? Just to make sure, The sensor used is just a universal sensor correct? It doesn't use the sensosr that changes resistance.
Thank You
Scott Bruce
1969 Turbo Lotus Europa

[Bernard Fife]

Scott,

There is a bit of a bug in some versions (up to 2.36) of the code for EGO (more accurately, there is a 'misunderstanding' between MS-II and MegaTune as to what the narrow band curve should look like).

Try setting the EGO to one of the WB (I set it to DIY-WB), then shut down both MT and MegaSquirt. Then fire them both up again and setting the 'calibrate AFR table' to narrow-band - be sure to press 'okay' - just because it is already highlighted doesn't mean you are done. Cycle MT and MS again, and see if it is better. This has worked for me.

Lance.

[Scott Bruce]

So your saying to set megatune to wide band sensor instead of narrow band in the EGO settings?

Another question, has any one found a fix for the idle air control so that the car will idle down after a cold start with out having to restart the car?It never start, warms up and idles down with out a restart
Thank you
Scott Bruce

[Bernard Fife]

Scott,

No, I'm saying set it to wide band, then set it back to narrow band.

Have you jumpered the large resistors on the bottom of MS-II as described in the manual? That fixes it for some people, at least. Also, upgrade to the latest code, if you haven't already.

Lance.

[Scott Bruce]

hi

are you saying the latest code for the idle control or both of the problems
Thanks
Scott