I have an S-AFC on my 94 LS, and when I change the settings it doesnt seem to do anyhting. For instance I can lean my car out -50% at low throttle on 1000 rpm, and the car will not stall, where as m friends si can only be leaned out like -35% then his car will stall. Also I had my car at +40% fuel on high throttle thru out the power band, and it will not add the fuel.

So in short I am runnin lean as hell right now, and the AFC will not richen it up at all! Has anyone else had this problem?? What would you do to fix it? Can anyone post an exact wiring diagram for the S-AFC on a 94 LS?? Thanks alot.

 

ttt

 

Any trouble codes?
The AFC and V-AFC can only add a certain amount of fuel, until the injectors are maxed at the current pressure setting. From what I have seen, 20-25% is about all either one is good for on stock pressure and stock injectors.
Try bumping up your fuel pressure if you are still lean, then retune the V-AFC...

Jason

 

Do you think with larger aftermarket injectors it will work better? I have RC 310's but there has been a fitment issue I have been dealing with for a while now. Thanks for the help.