DFCO disable?
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 4,043
Likes: 342
From: Central NJ
DFCO disable?
Guys, qq....my 99 has an A&A v3si. Its an auto with a 3200-3500 stall. The cars runs great with one exception. I do not like the extreme engine breaking when driving 75+ and taking my foot off the gas entirely. I have not tried these changes yet as I am on vacation but I am looking at removing tcc lockup at 0 and 6% tps. I am also looking at disabling DFCO. Thoughts about disabling DFCO entirely or what I really want is disabling DFCO only at high rpms or mph. Thoughts on disabling DFCO please...
Burning Brakes
Joined: Sep 2019
Posts: 928
Likes: 615
From: Navarre, Florida
It's been a while since I've messed with DFCO but, deceleration fuel cut off is what a lot of folks use to manipulate those annoying overrun pops and bangs on deceleration more than reducing engine braking. Engine braking, as far as I'm tracking, is more influenced by things like compression than anything else. But with DFCO disabled, your fuel trims will remain richer, and it'll likely smooth out tip in throttle response for when you get back onto the throttle and create a torque demand again.
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 4,043
Likes: 342
From: Central NJ
Guys, qq....my 99 has an A&A v3si. Its an auto with a 3200-3500 stall. The cars runs great with one exception. I do not like the extreme engine breaking when driving 75+ and taking my foot off the gas entirely. I have not tried these changes yet as I am on vacation but I am looking at removing tcc lockup at 0 and 6% tps. I am also looking at disabling DFCO. Thoughts about disabling DFCO entirely or what I really want is disabling DFCO only at high rpms or mph. Thoughts on disabling DFCO please...
