Just wondering if anyone has any tips that can help me out?? When the manifold is cold or slightly cool, for the first couple of minutes run time in Park/neutral. I get a lean out condition that will happen when I just tap the Throttle it will lean out and stall. It will also do this once or twice while in drive and just starting to accell from a stop, if im not smooth and slow on throttle. After a few minutes of running it is perfectly fine. It will also do this sometimes when I go from Park to drive. High map change causes a lean stumble/stall. Now i know that a heated manifold may help but is there any tricks that you guy's suggest. Once in closed-loop it is good. I can drive around it no problem, but i can also make it happen at will when I first fire it up. Any help or thoughts would be greatly appreciated!!! My Ae/Pe and BLM are all very good. By the way its a 7747ecm $42 mask and An Air-gap manifold. Thanks again.

 

unheated manifolds are a PITA, I have one, not an air gap though. Is this in just open loop? or is it in closed loop also? I am using the EBL, so I was able to add to the multiplier for my AE vs CTS. Maybe change the "open loop afr vs MAP table"? Get it a little richer for the high maps when in open loop.

 

Yes this does only seem to happen when in O/L. I have increased that area a little bit, 16% but it still seems to do it. Maybe i need a bit more. Once in C/L it seems fine. THanks for the reply!! Anyone else got any ideas??

 

Fatten up those OL A/F vs coolant tables. There is also a coolant temp based AE factor. It may take more than you realize.

 

Ok I will try that tonight. Thanks again guys.