Hi Guys

Recently had my Comptech install upgraded to 10 psi!
I've got a small issue I can't fix with the tuner.
I get a massive hesitation on hard accleration, sometimes with a small back fire.
On the recommendation of the tuner. To get the car to him I used a map from another S owner (with a similar set up) and turned on the O2 Feedback control.
in previous conversations with him he told me he didn't normally use it.
It is still on in the 3 maps he has done since.
I'm wondering if this is causing the hesitation?
Any one run with it on or got any experience?

 

Is it when you floor the throttle? It sounds like it goes momentarily rich- too rich. It should add extra fuel when you floor it and that fuel should quickly taper off. It sounds almost like it has too much extra added. I would need to see a log of your car (with wideband O2 data) before I could say for sure.

O2 feedback is available, but I always felt the car ran better without it.

Tim

 

It is on WOT and sometimes on throttle modulation.
It does feel exactly like it is going too rich for a fraction of a second.
I can email a log I have?