With fuel cut on decelerating enabled and set at 2000 under off boost driving my car will
buck. When I disable it the car works fine. Has anyone else found this to be the norm?
This a E6K on a street port T-78 single resonated mid pipe and a very quiet stock cat
back 550 primaries and 1600 secondaires

 

yes i have that problem on mine, right at 2000 rpm. also i know of another person as well.
I wonder why it does that.

Jason

 

It bucks, because under decceleration the injectors stop injecting fuel creating more "engine braking" once the injectors come back on (2000 rpms) you get that little push forward. This is normal but can be irritating at times. I sometimes disable this feature (burn more gas but increases drivability).

 

Mine does it too... I just hit the clutch a bit earlier usually I wonder if you could just set it to like 1500 rpm (closer to idle...) so it didn't start bucking for awhile longer. I'll try that tonight and see what it does.

 

Good thought. When I do Have it enabled I have it as low as possible, be careful not to set it too low or the injectors will come on too late and the engine will try to stall. Good Luck guys.

-Wayne

 

I think i'll take a datalog of the fuel cut at, say, 2000 rpm and see how low the idle drops with that setting, then set the fuel cut progressively lower until it drops a bit below that idle when decelerating, and then raise the cut rpm back up one 'notch'. I'll report back tonight

 

This is just for folks who have an auto and do the parallel-setup like I did. I had the same problem and dropped it to 1200, it lightly bucks a couple times but any lower and it stalls out. My engine is ported too so an unported engine might be able to go a little lower.