Quote from croyle on November 5, 2024, 7:06 pm

Hello everyone, I'm battling the above and hoping for some advice

I have a 800 mean street on a big block 4 speed car. I can get this to run ok other than a nasty lean condition after a mild decel and slowly easing back into the throttle- can go to 20:1.

I have adjusted all accel and fast accel, doesn't help. I have turned off DFCO, just pops the exhaust, doesn't help the lean decel cruise tip in. I've turned pump on rpm low and 100%.

Set idle counts and checked slack in the rear throttle blades.

I notice during decel, afr is negative (-20-30%) even when dfco is turned off. I'm assuming that's why there's no fuel there when easing back into it.

I see a lot of people on here with this concern and some that did not post a solution.

Any thoughts? Thank you!