Just was out for drive, looked in my side mirror when I got on the gas hard, and I saw it shoot a mix of white and black smoke. Usually it gives a little puff of straight black smoke. I seen it do it a couple more times, the smoke eventually was just white. I parked the truck shut the engine down, turned it back on and it wasnt smoking white anymore. It only has 51,000 miles and has a Six Gun, Monster exhaust and some guages. Im hoping its not the egr cooler but I have a feeling it is. Should I be worried???