i installed a 255lph walbro fp then dynoflash. i ran my evo and it began to hesitate or lose power over 3000rpm. everyone ive talked to seems to think i installed the fp incorrectly. i was told the white o-ring needed to be transfered from the stock fp to the new(in order to create proper seal). i went back and removed the white o-ring off the old to put on the new, and there is a black rubber looking piece in the way on the new fp where the white o-ring should go. can anyone help?

 

http://www.evomoto.com/tech_info.php...3_13&tech_id=9

 

thanks for that it was very helpful!