scan master flashing 0000.00 ????

[Evaddave 87gn]

Never saw this before...I looked at my maftpro it read 21.7?? WTH?

I just can out of a small pull boost was around 12 lbs Afr was 12ish..let off the gas and I got zeros and 21.7 Afr...I had to give it gas to drop Afr to 14....

 

[TurboBob]

decel fuel cutoff?

 

[Evaddave 87gn]

Shut off via extender chip.

 

[TurboBob]

the DFCO delay feature in the chip just changes when it will activate. it doesn't disable it.

Bob

 

[Evaddave 87gn]

Does the emc use the narrow band to determine change in fuel or is it based on tps or something else?
Recently I had to replace my wbo2 sensor I wonder if my narrow band is going south ?
Last night my scan master also showed knock at 26 mph with 815 MV and no retard. Thought that was a little odd to.

 

[Evaddave 87gn]

Changed to denso o2...

 

[TurboBob]

im not sure I understand the question. Are we still talking about DFCO?

26mph is about where the 1-2 shift happens, so you may get false knock there. It might even be real knock from the load change.

most modern chips ignore knock in the lower gears, so whatever happened, the chip will ignore it anyway.

Bob