Ok, I've had the SC in for about 3 weeks now, and everything is great. But last Tuesday, my car stalled out for no reason. I was coasting downhill, on the brakes, ready to make a right turn when all of sudden my steering went heavy. I thought I broke the SC belt or something, but then I noticed my tach read 0, and all my warning lights were on. So I stopped, restarted the car, and everything was fine. Then tonight, I was at a light, and all of a sudden all the lights came on again and I realized the car had stalled again. Sometimes on startup, the car is a little lumpy and idles low, around 500 rpm or so. But other than that, everything runs great. And the roughness at idle isn't all the time, just on occasion. I figured it was just the cold weather. ECU isn't throwing any codes although it has gone off twice for misfires, but I don't think that would really make the car stall when I'm coasting or idling. Any help would be appreciated. Thanks.

 

Sounds like it's your MAFS. Samething happened to me after I installed my SC. www.car-part.com has them cheap.

 

BOV is opened TOO much. or your spring is getting stuck OPEN.

adjust the tension on the BOV or play with spring.. give it some lube baby!

 

Thats south of the MAFS though, it should not effect the car's idle.