Long time lurker, new member. I've done a few TBI swaps in the past with the 7747 and had good luck. My daily driver is a 1992 Caprice wagon with a stock 305 and 700r4 with 3:07 gears. I've recently upgraded the wagon to a '7427 ecm and everything seems to be fine after the engine is warmed up. However, for the first couple of minutes of driving, it is a bit on the lean side. It does not bog or backfire through the intake, but just really sluggish and tapping the accelerator to kick some AE into the mix results in the engine smoothing out for a second, and then goes back to feeling sluggish. The O2 shows low, but may not be warmed up enough to be accurately responding. I have the fueling and timing tables pretty close, but just need a little advise on how to get the cold running a little better. Any ideas where to start would be greatly appreciated!
Thanks!