Ok, I know this questions been asked a billion times, but I just bought this truck yesterday. I've got a '93 F-250 XLT 4x4. These are the diesels that got me into diesels all together, but all I've ever done is repair them. I wasn't sure if there's a performance market for these IDIs or just some things I could do to make it run better, get better MPG, etc. Is there a way to tweak the injector pump like you can with the old Cummins VE pump? I know the things I need to look for maintenance stuff, but what can I do to this bad boy & get a little 'umph'?