LoWeLL216

iTrader: (1)

Is it dangerous to force closed-loop operation from a start-up situation?

After an injector swap I get freefiring on deceleration and on shifting from cold startups until the car enters closed-loop.

I logged my commanded AFR from startup and it goes from around 9:1 to stoich following a decay rate that lasts slightly over 2 minutes. As soon as the car enters closed-loop the freefiring stops.

I tried forcing closed-loop just to see if it had any effect and sure enough the car didn't freefire at all. Obviously this isn't the solution since I don't want to start my car commanding a 14.7:1 AFR with narrowbands that aren't warmed up yet, but it is strange that it works.

Also, what forces the car into closed-loop from open-loop? I know it's more than just your ECT. Thanks!

P Mack

iTrader: (6)

You may just want to mess with your open loop F/A vs ect table.

ringram

Agreed, sort out your open loop VE and fueling instead.
You cant force closed loop when cold as O2 sensors wont work properly until hot.

TAQuickness

iTrader: (28)

agreed agreed. the freefiring you refer to is the excess fuel lighting off in the exhuast pipes aka raz.

LoWeLL216

iTrader: (1)

This may be a stupid question, but do you need a wideband to tune your OLFA table?