Hey everybody! It seems this site will prove to be useful and I'm having a few issues so I ended up here to test your knowledge. I have an 05 duramax 250k miles, efi live and an afe intake. Recently I've been getting a surge at idle, enough to make the truck lurch forward, also it's accompanied by quite a bit of smoke coming from the tailpipe. No CEL, so I'm leaning toward FPR. Anybody have any thoughts before I start throwing money at it? Already am running power service cetane booster in it. Thanks in advance for all of your help!