Hey guys, I have a 02 A4 1.8t Q-Tip. I have had the Revo download for sometime now and I am experiencing some surging problems. When I bought the download I also installed a Forge DV 007 with the middle spring (forgot the color). I changed the plugs back to the stock ones thinking it may be that after doing a search on the site, that helped for about a day, but the surging is back. When I have that car back to stock mode it does not do this and drives completely normal with no issues. Which kind of leads me to believe it wouldn’t be a hose or DV connection, or a boost leak. Think it may be that I have to change the spring in the DV to the stiffer one, is anyone else out there running that spring (the stiffest one) I think it’s the blue one, not sure though.

Thanks