Does anyone know here how to make the secondary afr table useable? Say I wanted to have map switching on to switch to the secondary afr table because I'm running higher octane fuel. ms2extra 3.2.1

use table switching.

Why would the AFR targets change by the fuel octane?

I did use table switching but the 2nd afr table doesn't show itself as an option, it is still greyed out.

meant different fuel.

But unless you recalibrated your O2 sensor too it'd still read correctly.

As in the AFR is calculated from lambda, so a displayed 14.7:1 when burning petrol (gasolene) which is lambda of 1, will also display 14.7:1 when at lambda and burning pure meth.

So from the user point of view the AFR you're looking at in your tuning software will never change, but the engine will be seeing much different levels of fuel/air.

I'm finding it very hard to explain, but Joe Perez put it very sussinctly in one of his posts.

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96 w/2001 motor. MSII & Full Sequential Injection. MegaView. MP62. Dual Throttles. FMIC. & much more...

You have to turn the second table on within the AFR settings. Then I'm not even sure AFR targets is a tableswitching option, it's been a while.

I think two timing tables for different octane gas makes more sense, and old and tired msI can handle that simple request.

I'm aware of this

AFR table switching is not an option on the MS2. The second table is there if you want to run different AFRs on the two banks of a V engine (ie a V8), using two different wideband sensors.

So what are you trying to achieve then?

Another fuel map to make use for table switching

I still dunno why fueling requirements would change, and why not timing?

If you're switching between types of fuel, say pump 93 and E85, your fuel (and timing) requirements will change radically. I'm not sure why a simple table switch isn't good enough for the OP though.

Because the VE table is useless in MAF mode