I am currently fighting with Codes P0087/P0088 Both during the same drive cycle. The truck is completely stock. I had to recently replace two injectors, so I elected to have all 8 replaced. Roughly 45 days after the injectors were replaced I now have these 2 codes intermittingly coming up. I am looking for some advise or direction as how to correct this/these concerns. The truck has roughly 227500 miles.