I am running dsm 450s (blue tops) and I have developed a really weird problem. If I let my car sit for a couple of days without driving it will give me a hard time starting. I know it is getting spark because I checked. Now to get it to start I have to pull the injector clips and start it, and it will actually run for a couple of seconds with the injectors unplugged.....then I plug the clips back in and it will start right up (most of the time). I have tried pulling the spark plugs and letting it sit to see if it was just flooded but that has never worked. Any help would be great.