Anyone had issues with erratic RPM fluctuation and sometimes even going dead after filling up with gas? It does this every time I fill up. Car will idle as normal and then about 20-30 seconds after cranking the engine will idle roughly and the rpm will drop to almost shutting the car off then go back to normal and does this for about a minute. Sometimes it even shuts off. If it does not die, it does that for about a minute or so then it goes away and never does it until next time I put in gas. It has done this since I have owned the car (almost a year) and I know the previous owner and he said it did that to him for as long has he owned the car (2 years). I always use the highest octane gas.
2008 Roush 427R 4.6 3v
2008 Roush 427R 4.6 3v