I've got a 383 w/ fast burn heads,tpis cam,accel lingenfelter supper ram intake and accel dfi. I know the fuel ratio should be around 14:1 and I do have that setting on air/fuel ratio map but the exhuast reeks of unburned fuel. the injector timing (opening duration) is set at 1.0. Should that setting be changed and what is the best ratio?

 

lot's of lookers, no takers. lol If anybody has any info, the help would be greatly appreciated. The injector duration is right now at 1.0 which I assume means the injectors are wide open. should I turn that down to a smaller amount? say.9 or lower?

 

Maybe you have other problems. Is that closed loop with an O2 sensor? or is it open loop just going off a map and a pressure sensor and throttle position?

Try some basic stuff if you haven't already.

Put a vacuum gauge on your manifold to see what vacuum you have.

Look at your spark plugs to get an idea of what is happening.

Also, borrow a wideband sensor to check your actual mixture if you can.