golfg60 0 Posted March 14, 2005 Hi chaps, My G60 has had the boost return mod done by the previous owner and the K&N breather filter on the ISV is caked in oil (causing the idle to be lumpy). Is it worth making the pipe from the ISV longer to try and stop this from happening? Are there any good cleaners out there than are a good alternative to the pricey K&N cleaning kit? Cheers Tom Quote Share this post Link to post Share on other sites