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That's exactly what I was tryng to say, higher heat= less mass in the air causing the stock ECU to cut fuel and cause a really quick lean condition. Because the actual air at the TB was alot cooler due to the intercooler actually working extremely well. It was cooling it by almost 60* from what the stock ECU was seeing at the MAF sensor. Wouldn't a 60* difference in actual intake temps cause a AFR problem in the combustion chamber if the stock ECU thinks the actual IATs are 60* warmer than they actually are? And once you get moving and the motor sucks in all the hot air under the hood it will even out a little and cause it to correct itself or the stock ECU sees the lean condition at the primary O2 sensor and dumps more fuel. My tuner has my car setup so that the stock ECU is handling almost all the fueling in vacuum. Except at idle with the AC on.
What about vacuum spiking in the onboard MAP sensor? Does AEM use an orafice in the MAP sensor? This would happen with the emanage ultimate if the pressure sensor orafice wasn't used. It would cause voltage dipping and spiking on the MAP sensor voltages causing the emanage to have fuel dilvery irregularities and inconsistant fueling in boost and sudden throttle change problems. But I think this would only happen in boost though, right? I even had to add something similar to smooth out my GReddy boost guage pressure sensor because my boost guage needle was bouncing all over the place in boost and vacum. Weird huh? Well good luck Chris, I'm completely out of thoughts since I only know about tuning the ermanage Ultimate and it's problems and have absolutely no idea how the F/IC even works. Well I know how it works in general but I don't know how it works specifically. later bro.....Keep on plugging and keep us posted to whatever it is you find that's causing this.
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