[racprops]

Thanks that is deep think..

I am using a Dutchman Optimizer with has to digital O2 mod and has the good sense to have a timer to delay changing the output for a minute to allow the CPU to do its check and set ups.

And yes I have couple for both front and post O2s.

You are right although I can get the system to 16.5 it will not last and something like 3 to 5 minutes it goes open loop and nuts.

And I can do the same thing using the Optimizer but had some minor connection problems and will retesting it soon, but it looked good and it seemed to be able to change the A/F ratios with out the problems I ran into with changing the MAF...

Will have to watch the fuel trims with this one, The MAF seemed to cause major fuel trim changes ...will watch for them with the O2s.

Rich