My LLY has 225k on stock injectors. It runs good, idles smooth and doesn’t have any knocking sounds. However it does smell very strong of diesel exhaust, almost as if it’s completely straight pipped (it’s bone stock). Once every now and then it’ll blow a bit of blue smoke upon acceleration but does not blow any smoke at idle. During the summer months it usually blows a decent amount of black smoke if I get on it. Any ideas? Assuming it’s something injector related, would a cleaning help? It’s bone stock, just wondering what my options would be to check and see if any injectors or bad or failing.
