I appreciate your quick feedback LehooZeher.Sorry to hear about your troubles. I struggled with this for awhile as well. A few things I learned:
- The O-ring doesn't always need replacing, but it DOES need to be seated properly to get good fuel delivery. This can make a huge difference in the pressure you get at the injectors
- Don't buy a knock-off brand. I'm pretty sure the knock-off I got for $50 was not really a Wahlbro, and it started failing after a couple of months. Especially if you're doing forced induction, spring for the high-pressure one here:
- A nice fuel rail helped, too. I got the Boomba one, and it installed with my Kraftwerks without any problems.