Can I swap computers and get rid of the post combustion injection event? I thought it might keep the soot down in my oil and maybe get a little better mpg. My pickup has ran funny ever since I got it. Some times it runs well, but it usually does not want to spool at low rpm's. Why do some people say it is harder to get big power out of a 03 or 04 than it is on a 04.5 and later?