My car has developed a problem, bad enough that I can't drive it. It started a couple weeks ago and has gotten progressively worse. Under load or not, if you ease in to the throttle it will run fine. But, if you blip the throttle or hold it wide open, it will miss out from 2,500 rpms to 4,000 rpms. Once you hit 4,000, it fires on all eight. There are no codes at all. Now I did have the injectors off of it this weekend, and I did see that on two of them, the pintle caps are broken. They are on oreder. Could they be the cause of this? Weak fuel pump maybe?